Raising sheet metal into surfaces and hollow forms — Planning and preparation

Course field	Details
Programme	Raising sheet metal into surfaces and hollow forms
Module	Planning and preparation
Target group	Vocational learners in Blacksmithing, Artistic metalwork, silversmithing, coppersmithing and related craft-metal occupations
Language	English
Selected jurisdiction	United Kingdom — legal and vocational detail in this module is explicitly scoped to England.
Current-check date	1 September 2026
Learning mode	Blended theory, supervised workshop observation, planning exercises and trainer-authorised practical work
Open licence	Original course text: CC BY-SA 4.0. Third-party media remain under the licences stated on their source pages.
Review status	Ready for review by a practising blacksmith or metalsmith, a competent workshop health-and-safety reviewer and a vocational educator

Safety and jurisdiction notice: This module teaches planning and preparation. It does not authorise unsupervised hot work, hammering, cutting, grinding, machine use, annealing, pickling or chemical treatment. Carry out hazardous workshop activity only when a competent trainer or employer has authorised it and the required supervision, risk assessment, safe system of work, guarding, ventilation, emergency arrangements and personal protective equipment are in place. Current legislation, official HSE guidance, the employer's risk assessments and procedures, material safety information, equipment instructions and site rules take precedence over this learning resource.

Country boundary: The occupational-training reference in this module is the Skills England Blacksmith apprenticeship standard. It must not be treated as an automatic equivalent to qualifications, apprenticeships, job titles, licences or certification in Scotland, Wales, Northern Ireland or any other country. No cross-country equivalence is claimed.

Image study note: These stakes and hammers from a British silversmith's workshop show why planning begins with the intended geometry. A forming tool is selected for the contact radius, access and finish required by the work rather than simply by its size.

Introduction

Raising turns flat sheet into a three-dimensional surface or hollow form through planned sequences of controlled hammering against suitable support tools. In artistic metalwork, related operations may include sinking, blocking or bossing, raising, annealing where the material and process require it, planishing, trimming and finishing.

The quality of the finished form is strongly influenced before the first blow is struck. You need to understand the drawing, identify the material and condition, decide how the form will be developed, choose compatible hammers and stakes, prepare gauges or templates, assess risks, inspect the workplace and define inspection points. Good preparation reduces wasted movement, damaged surfaces, distorted rims, cracks, avoidable rework and material waste.

This module focuses on the decisions that make a raising operation controlled and repeatable. The practical examples use the vocabulary commonly encountered in British blacksmithing, silversmithing and artistic metalwork education.

Learning Outcomes

By the end of this module, you should be able to:

Job planning: Interpret a drawing, sample or design brief and convert it into a practical forming sequence.
Sheet metal: Identify relevant material information, thickness, condition, surface requirements and traceability needs.
Raising: Explain how raising differs from sinking and planishing and select an appropriate sequence.
Metalworking hand tools: Select and inspect suitable hammers, mallets, stakes, stake plates, supports, gauges and marking tools.
Risk assessment: Identify significant hazards and propose controls using the hierarchy of control and current workplace procedures.
Quality control: Define measurable checkpoints for profile, symmetry, rim, surface condition, dimensions and defects.
Sustainable manufacturing: Plan work to reduce scrap, unnecessary heating, consumable use, rework and energy demand.
Technical communication: Produce a clear job plan that another competent craftsperson or trainer can review before work starts.

Jurisdiction, Standards and Training Context

United Kingdom — England Training Context

For this module, the selected country is the United Kingdom, while the detailed vocational-training pathway is deliberately restricted to England. Training systems elsewhere in the UK are not merged into this course.

As checked on 1 September 2026, Skills England lists the Blacksmith occupational standard ST0378, version 1.1 as Approved for delivery at Level 3. The page identifies the route as Creative and design and gives a typical duration of 48 months. Its occupational content includes interpreting technical drawings and designs, selecting suitable processes, materials, tools and equipment, planning work, hot forging, thermal cutting and welding, bench work, preparing and maintaining tools and equipment, finishing, quality focus and a positive safety culture.

Skills England: Blacksmith occupational standard ST0378 v1.1

Important: This aiMOOC is a learning resource. Completion does not itself award the apprenticeship, certify occupational competence or replace provider and employer assessment.

Official Reference Points

The following official sources should be checked again by the trainer or employer when the module is delivered because legislation, guidance, standards and workplace arrangements can change:

HSE — Provision and Use of Work Equipment Regulations 1998 overview: Work equipment must be suitable, maintained and, where required, inspected; users must receive appropriate information, instruction and training.
HSE — COSHH overview: Exposure to substances hazardous to health, including relevant dusts, fumes, gases and liquids, must be adequately controlled.
HSE — Control of Noise at Work Regulations: Employers must assess and control harmful workplace noise exposure.
HSE — DSEAR: Dangerous substances that can create fire or explosion risks require assessment and control.
HSE — Manual handling at work: Hazardous manual handling should be avoided where reasonably practicable and unavoidable risk assessed and reduced.
HSE — Personal protective equipment at work: PPE selection, provision, information, instruction, training, maintenance and replacement must follow current duties and the task risk assessment.
BSI — UK National Standards Body: BSI is the United Kingdom's National Standards Body and represents the UK in international and European standards work.

Examples of current product standards that may be relevant to PPE selection include BS EN ISO 16321-1:2022 for occupational eye and face protection and BS EN ISO 20345:2022+A1:2024 for safety footwear. A standard number alone does not prove that an item is suitable for a particular task. Selection must follow the current risk assessment, applicable law, manufacturer information and workplace procedure.

Core Concepts

Raising, Sinking and Planishing

Raising is a controlled sheet-forming method used to develop higher walls and hollow forms by working the metal against a stake or other firm support. In a typical course of raising, overlapping blows are applied in a planned path while the work is progressively rotated. The exact hammer orientation, support geometry and sequence depend on the form, alloy, thickness and stage of work.

Sinking or dishing forms a hollow by driving sheet into a concave or yielding support. It is often useful for establishing an initial depression or rough preform. It generally stretches the sheet more directly than a conventional raising sequence.

Bossing or blocking is rough preforming, often with a mallet and a yielding support such as a sandbag or wooden block. Terminology varies between workshops, so record the term used in your training environment.

Planishing uses relatively light, controlled finishing blows over close support to refine contour, smooth local irregularities and improve the surface after the major shape has been established. It is not a substitute for correcting a badly planned form.

Process	Main purpose	Typical support	Planning question
Raising	Develop wall height and hollow form through successive controlled courses	Shaped steel stake or equivalent approved support	Which stake radius and course sequence will move the form toward the drawing?
Sinking	Establish or deepen a hollow	Concave stump, block or approved yielding support	How much initial depth is needed without excessive stretching or thinning?
Bossing or blocking	Roughly preform a broad volume	Sandbag, wooden block or other yielding support	Will a rough preform reduce later raising effort without damaging the required surface?
Planishing	Refine contour and surface	Close-fitting polished stake or dolly	Is the underlying geometry already correct enough to finish?

Process Logic Diagram

Read drawing and brief	→	Confirm material and condition	→	Develop blank and profile gauges	→	Choose process sequence and tools	→	Assess risks and inspect equipment	→	Supervisor hold point	→	Form in controlled stages	→	Measure, correct and finish

Text alternative: Start with the drawing and material, plan the blank and gauges, choose the sequence and tools, complete risk and equipment checks, obtain the required supervisory release, form in stages, then measure and correct against the quality criteria.

Material Behaviour and Work Hardening

When many metals are plastically deformed at workshop temperature, they become harder and less ductile. This is commonly called work hardening. The effect is important in raising because repeated hammering can make further deformation more difficult and can increase the risk of cracking if the process continues without an appropriate response.

Annealing can restore ductility in suitable metals when carried out correctly, but there is no universal annealing cycle for all sheet. The required temperature range, atmosphere, heating method, quench or cooling practice and cleaning method depend on the alloy and its condition. Follow the material specification, workplace procedure and trainer's instruction. Do not improvise heat treatment from colour alone.

Material springback, grain structure, previous cold work, local thinning and surface damage can also affect the result. If the material identity or condition is uncertain, stop and identify it before heating or forming.

Reading the Job Brief and Drawing

Before selecting tools, turn the design information into measurable workshop requirements.

Question	What to record	Why it matters
What is the finished geometry?	Rim diameter, maximum diameter, depth or height, base shape, shoulder position, wall angle and required radii	Determines blank development, support geometry and inspection gauges
What is the material?	Alloy or grade, thickness, temper or condition, supplied size and any traceability requirement	Controls forming behaviour, force, annealing strategy and finish
What surface is required?	Planished, textured, polished, oxidised, left hammer-marked or prepared for another finish	Influences hammer-face condition, protective handling and process order
What tolerances apply?	Dimensional limits, symmetry expectations, rim level and fit with mating parts	Turns visual judgement into measurable acceptance criteria
What must not change?	Features, holes, seams, engraved areas, decorative marks, datum points or minimum thickness	Prevents forming operations from destroying functional or aesthetic requirements
How will it be checked?	Profile templates, dividers, callipers, straightedge, surface plate, height gauge or approved workshop gauges	Allows correction while the form is still workable

Where a drawing is incomplete, do not invent critical dimensions. Raise a query with the designer, trainer, supervisor or client and record the agreed decision.

Authentic Workshop Examples

Example 1 — Raised copper bowl: A shallow decorative bowl may begin as a circular copper blank, be rough-preformed where appropriate, then raised in successive courses over stakes and finally planished. A profile template and rim measurement help maintain symmetry.

Example 2 — Mild-steel dome or finial component: A sculptural or architectural piece may require dishing, raising and local correction. Low-carbon steel generally demands more force than copper and may introduce additional hot-work controls if the approved process includes heating.

Example 3 — Decorative hollow feature for artistic metalwork: A boss, pod or organic hollow form can combine synclastic and anticlastic curvature. The sequence must account for access, tool clearance, surface texture and whether the work will later be joined to another component.

Object-study note: This archaeological copper-alloy bowl is documented as being made from sheet metal hammered into a hollow form and later repaired. Use it to discuss how forming marks, damage and repair history can reveal process choices. Do not assume that its historical makers used a modern raising sequence or modern safety controls.

Object-study note: A hammered hollow object can be read as a record of tool contact, curvature and finish. Look at the transition from base to wall and consider where a maker would need different support radii. The image illustrates a hammered hollow surface; it does not by itself prove a particular sequence of raising operations.

Tools, Stakes and Workshop Equipment

Tool selection is a geometry-and-condition decision. The contact surfaces of tools must support the intended movement of the metal without introducing unwanted grooves, flats or sharp transitions.

Image study note: Identify the different hammers, anvils, mandrel, rawhide mallet and supporting tools. Ask which operations require a hard polished support, which use a yielding support and which are unsuitable for striking at all.

Image study note: Silversmithing hammers have deliberately different faces and proportions. A practitioner selects a face for the intended contact shape and keeps it in a condition appropriate to the required finish.

Tool or equipment	Planning function	Pre-use points
Raising hammer	Delivers controlled blows during raising	Face clean and appropriate, head secure, handle sound, no mushroomed or cracked striking surfaces
Bossing or blocking mallet	Rough-preforms sheet on yielding support	Head secure, surface sound, size suitable for the work and support
Planishing hammer	Refines contour and surface	Face polished or finished to the required standard, edges free from damage
Stakes	Provide local support and curvature	Correct radius and access, working surface clean, stake undamaged and secure
Stake plate or stand	Holds the stake rigidly	Stable, appropriate height, secure mounting, adequate clearance
Sandbag or wooden block	Provides yielding support for rough preforming	Condition suitable, no embedded debris, stable support, approved for the task
Dividers, callipers and rule	Check dimensions and symmetry	Correct range, readable, handled so sharp points do not create unnecessary injury risk
Profile template	Checks contour against the drawing	Clearly labelled with datum, orientation and target profile
Marking tools	Establish centres, guide circles and reference lines	Method compatible with the required finish; avoid deep scratches that can become defects
Shears, saws or cutting machinery	Produce the blank when authorised	Correct guarding, setup, blade condition and user competence under PUWER and workplace procedures

Never strike an improvised support or a damaged tool merely because it appears to fit the curve. Tool suitability includes strength, security, surface condition and intended use.

Materials and Consumables

Material	Typical planning considerations	Caution
Copper such as C106 or CW024A	Ductile and widely used for training, decorative vessels and silversmithing-style exercises; develops work hardening during cold forming	Annealing and cleaning must follow the approved material and workshop procedure
Low-carbon steel	Stronger forming resistance, useful for sculptural and architectural work, capable of cold or approved hot forming	Heating adds fire, fume, scale and burn hazards; coatings and unknown surfaces require identification before any hot work
Brass	Attractive colour and useful decorative properties; forming behaviour depends strongly on alloy and condition	Poorly planned deformation or heat treatment can promote cracking; use the actual material data
Aluminium alloy	Low density and potentially easy to form in suitable grades and tempers	Alloy and temper vary greatly; never assume one generic annealing or forming rule
Silver	Traditional raised hollowware material with excellent craft applications	High material value makes blank development, scrap control and contamination prevention especially important

For any material, record the specification if known, thickness, condition, surface state and batch or traceability details where the job requires them. Keep clean offcuts segregated by alloy so that they remain useful for recycling or later test pieces.

Consumables can include layout media, abrasives, approved lubricants, cleaning materials, pickling solutions and fuel gases. Each must be assessed using current manufacturer and workplace information before use. Do not transfer chemicals into unlabelled containers.

Planning the Form

A useful plan connects the finished profile to the starting blank and to a sequence of intermediate shapes.

1. Establish datums. Mark or define the centre, rim plane, axis of symmetry and any feature positions.

2. Make a full-size or scaled profile. A half-profile template is often efficient for axisymmetric bowls and vessels. Mark which edge is the datum and which side faces the work.

3. Determine the starting blank. Use the drawing, a proven workshop development method, sample development, calculation appropriate to the geometry or a trainer-approved trial blank. There is no single universal allowance because the result depends on process, material movement, trimming allowance and finished geometry.

4. Plan intermediate stages. Sketch the intended shape after rough preforming and after key raising courses. Large abrupt changes are more difficult to control than staged changes.

5. Identify inspection points. Decide when you will check rim diameter, depth, profile, symmetry, surface and signs of cracking or folding.

6. Plan annealing only when required. Base the decision on the material, amount of deformation, observed work hardening and approved procedure rather than on an arbitrary number of hammering circuits.

7. Reserve trimming and finishing allowance. Do not trim to final dimensions too early if later raising will move the rim.

Planning Sheet Template

Planning item	Learner entry
Job or drawing reference
Finished rim or opening
Finished depth or height
Material and thickness
Starting blank method and allowance
Initial forming method
Planned raising stakes
Hammers or mallets
Profile gauge or template
Annealing decision points
Main hazards and controls
Quality checkpoints
Supervisor release

Risk Assessment and Control Measures

Risk control begins before practical work. Use the workplace risk-assessment system and apply the hierarchy of control: eliminate hazards where possible, substitute safer processes or materials where appropriate, use engineering controls, then administrative controls, with PPE as a final layer rather than the only control.

Hazard	Why it matters	Planning controls to consider
Sharp sheet edges and burrs	Cuts to hands and forearms	Deburr by an approved method, control handling, maintain clear storage and use task-appropriate hand protection where the risk assessment specifies it
Flying particles and scale	Eye or face injury	Maintain tools, remove loose contamination safely, use guards or screens where applicable and wear selected eye or face protection
Repeated impact noise	Hearing damage	Assess exposure, reduce noise at source where reasonably practicable, limit exposure through work planning and use selected hearing protection where required
Damaged hammers, stakes or mounts	Tool failure, flying fragments, loss of control	Inspect before use, remove defective equipment from service and secure stakes in approved holders
Repetitive hammering and awkward posture	Musculoskeletal strain	Set appropriate working height, alternate tasks, plan rest and recovery, keep the work within a stable reach zone and obtain ergonomic guidance where needed
Manual handling	Strain or crush injury from workpieces, stake plates or stands	Avoid hazardous handling where practicable, assess unavoidable handling and use lifting assistance or team handling under workplace procedure
Heat, flame and hot metal	Burns and fire	Use only an authorised hot-work area, remove or control combustibles, provide competent supervision, check emergency arrangements and identify hot work clearly
Fuel gases or flammable substances	Fire or explosion	Follow DSEAR-based workplace controls, approved storage and equipment checks; only trained authorised people connect or operate fuel-gas systems
Dust, fumes and coatings	Respiratory or systemic exposure	Identify the metal and coatings, avoid heating unknown or coated material, control exposure at source using suitable extraction and follow COSHH assessment
Cleaning and pickling chemicals	Burns, harmful vapour or incompatible reactions	Follow COSHH assessment and safety data, use approved containers and handling equipment, segregate incompatibles and use trainer-authorised procedures
Powered cutting, grinding or polishing equipment	Entanglement, ejection, contact and dust hazards	Use suitable guarded equipment, inspected and maintained under PUWER, with trained users and correct extraction or containment

Critical stop rule: If the sheet composition, coating, tool condition, ventilation, guarding, fuel-gas equipment, chemical identity or supervision status is uncertain, do not start the hazardous operation. Escalate the issue to the responsible trainer or supervisor.

Video study note: This HSE hearing-protection demonstration supports discussion of why hearing protection must fit correctly and why PPE belongs within a wider noise-control strategy. Follow current HSE guidance and your workplace noise assessment.

Accessible and Inclusive Workshop Planning

Professional preparation includes designing the learning environment so that people can participate safely and effectively.

Accessible workshop: Set benches, stake stands and visual demonstrations so that learners can see the process and work at an ergonomically suitable height.
Inclusive communication: Provide written, spoken and visual instructions, explain specialist vocabulary and allow learners to confirm understanding before hazardous activity.
Hearing protection: Do not rely on shouted instructions in a noisy area; establish visual stop signals and communication methods that still work when hearing protection is worn.
Reasonable adjustments: Plan individual adjustments with the learner, training provider and employer while preserving the required safety outcome and occupational competence.
Left-handed working: Check work positioning, tool clearance and demonstration angles rather than assuming a single handedness.
Fatigue management: Repetitive hammering can reduce control. Sequence learning and work so that fatigue is noticed and managed before quality or safety deteriorates.

Inclusive practice does not mean lowering safety controls. It means finding an effective way for each learner to understand, demonstrate and develop the required competence.

Step-by-Step Demonstration: Plan a Small Raised Bowl

This demonstration is a trainer-led planning and observation exercise. Any cutting, hammering, annealing, pickling or machine use must be carried out only under the supervision and workshop controls required by the provider or employer.

Practice brief: Plan a shallow axisymmetric bowl in trainer-specified sheet copper, for example approximately 1.2 mm C106 or CW024A where this material is approved by the workshop. A notional finished size might be about 120 mm at the rim and 35 mm deep. These dimensions are a teaching example, not a universal blank formula or production specification.

Stage	Demonstration action	Learner checks
Read the brief	Identify finished profile, rim, depth, surface finish and tolerances	Can every required dimension be measured or clarified?
Confirm material	Check alloy or grade, thickness, condition and surface	Is the material positively identified and suitable for the planned process?
Develop the blank	Use the drawing and an approved development method or proven trial data to establish a starting disc plus trimming allowance	Is the method recorded rather than guessed?
Make the profile template	Produce a clearly labelled half-profile gauge from the drawing	Are datum, orientation and target contour unambiguous?
Sketch the sequence	Draw the intended rough preform and several intermediate raising shapes	Do the stages change progressively rather than abruptly?
Select supports	Choose a rough-forming support if required and stakes with radii suited to the developing wall	Can the work contact each support without fouling or creating a sharp local transition?
Select hammers	Match raising and planishing hammer faces to the operation and finish	Are faces clean, appropriate and undamaged?
Inspect the workstation	Check stake mounting, floor condition, lighting, clearance, ventilation and tool condition	Are defects reported and defective equipment removed from use?
Complete risk controls	Review sharp edges, noise, impact, ergonomics, hot work, chemicals and any powered equipment	Is the current workplace assessment available and understood?
Mark references	When authorised, establish the centre and light guide circles or course lines without creating deep scratches	Will the marks remain useful without becoming surface defects?
Dry-run the movement	With no striking or heating, demonstrate how the work will rotate and where hands will remain clear	Can the learner maintain stable posture and consistent orientation?
Supervisor hold point	Present the plan, tools, material, gauges and controls for release	Has the authorised trainer or supervisor agreed that work may start?
Observe a short first course	The trainer demonstrates a short sequence of regular overlapping raising blows over the selected stake, rotating the work consistently	Can you identify the guide path, support contact and change in wall angle?
Measure	Stop, check profile, depth, rim and symmetry	Is the form moving toward the planned intermediate shape?
Decide the next condition step	Assess work hardening and material response against the approved procedure	Continue, correct, or anneal only when the material and workplace procedure indicate it
Record	Note tools, sequence, measurements, defects and decisions	Could another competent person understand what happened and why?

Video study note: UK silversmith and metalsmith Adrian Hope demonstrates making a large copper bowl. Watch for the relationship between repeated forming, support tools, shape checking and the evolving surface. The video is a process reference, not a substitute for your own workshop risk assessment or supervision.

Video study note: Adrian Hope's small silver-bowl demonstration is useful for observing the rhythm and repetition of raising over a complete object. Compare the observed sequence with your written plan and identify the points at which a professional maker checks or changes the process.

Country label — United States technique reference: The Art League School demonstrates the first round of raising a copper bowl. Use it to compare visible technique and vocabulary only. It is not UK legal, qualification or certification guidance. UK and England-specific rules and workplace instructions in this module take precedence for this course.

Common Errors and Corrections

Observed problem	Likely planning or process cause	Corrective response
Rim becomes wavy	Uneven course progression, inconsistent rotation, excessive local movement or poor support	Stop early, check symmetry and profile, identify high and low areas, then use a trainer-approved correction sequence rather than forcing the rim flat
Folds or puckers develop	Too much circumference being gathered at once or a stage change that is too abrupt	Stop before the fold closes, reassess the intermediate geometry and reduce the severity of each planned stage
Cracks appear	Excessive work hardening, unsuitable alloy or condition, deep scratches, overworking a local area or poor heat-treatment planning	Stop; do not hammer a crack closed. Identify the cause and obtain a supervisor decision on repair, rework or scrapping
Deep hammer marks	Damaged hammer face, inappropriate face radius, excessive blow force or poor support contact	Inspect and correct tool condition, choose a better-matched support and practise controlled blows on a test piece
Flat spots in a curved wall	Stake radius too flat or work held in one position	Select a support that better matches the local curvature and maintain controlled rotation
Form leans to one side	Centre or datum lost, unequal working around the circumference or inaccurate setup	Re-establish datum references, measure opposite sides and plan balanced correction
Final part is undersize after trimming	Trim allowance removed too early or material movement underestimated	Keep a documented allowance until major forming is complete and use proven development data for repeat work
Surface becomes contaminated	Dirty stake, embedded grit, mixed-metal debris or poor storage	Clean support tools and work area, segregate materials and protect the intended finish

A recurring professional habit is to stop and measure before a small deviation becomes a large defect.

Quality Criteria

Quality is agreed against the drawing, sample, client brief and workplace standard. The following criteria are a useful planning checklist.

Criterion	Evidence	Typical check
Dimensions	Rim or opening, depth, maximum diameter and feature locations within specified limits	Rule, callipers, dividers or approved gauge
Profile	Wall contour follows the drawing or master sample	Labelled profile template
Symmetry	Balanced form around the datum or intentional asymmetry matches the design	Opposed measurements, visual rotation, template checks
Rim	Level or deliberately shaped, sufficient material remaining for final treatment	Straightedge, surface reference and dimensional check
Surface	Hammer texture or planished finish is consistent with the specification	Raking light and close visual inspection
Wall condition	No unacceptable cracks, folds, deep gouges or unplanned sharp transitions	Visual and tactile inspection; additional methods if specified
Thickness	Minimum thickness and local variation acceptable where the drawing or process controls it	Suitable thickness-measurement method where required
Fit	Part interfaces correctly with mating components	Trial fit or fixture check where authorised
Documentation	Material, tools, checks, deviations and approvals recorded	Job sheet or digital production record

Country label — United States technique reference: This planishing demonstration is useful for observing close support and finishing blows on sheet metal. Use it as a visual technique reference only; it does not replace UK workplace instructions or determine whether a powered or manual planishing method is suitable for your task.

Sustainability and Resource Efficiency

Sustainable craft practice starts with good planning rather than with recycling alone.

Material efficiency: Develop blanks carefully and keep trimming allowance no larger than the process reliably needs.
Rework prevention: Use templates and intermediate checks so that errors are corrected early.
Scrap segregation: Keep clean copper, brass, aluminium, steel and precious-metal scrap separated according to workplace recycling routes.
Tool maintenance: Smooth, serviceable tools reduce avoidable surface damage and replacement demand.
Energy efficiency: Heat only when the approved process requires it, use appropriately sized equipment and avoid unnecessary reheating.
Consumable control: Mix, issue and dispose of cleaning or pickling chemicals only according to workplace need and environmental procedure.
Local repair: Where quality and safety requirements permit, assess repair before discarding a nearly complete component.
Design for longevity: Consider durability, repairability, replaceable attachments and finishes when translating the design into the forming plan.

Do not compromise required ventilation, guarding, safe heating or other risk controls in the name of saving energy or consumables.

Media and Licensing Notes

The media below were selected for direct learning value. Always check the file page for the current attribution and licence before reusing an image outside MOOCwiki.

Wikimedia Commons — Silversmithing anvils and hammers.jpg: British silversmith's stakes and hammers; useful for tool identification.
Wikimedia Commons — Tools in Sophies Silver jewellery workshop 1.jpg: Workshop tool set including hammers, anvils, mandrel, rawhide hammer and sandbag.
Wikimedia Commons — Marteaux - Evellin Orfèvre - DSC 0355.jpeg: Specialist silversmithing hammers.
Wikimedia Commons — Copper Bowl with Lobster MET 1987.394.178 b.jpg: Hammered copper hollowware for object study.
Wikimedia Commons — Roman to Early Medieval bowl details: Archaeological hammered sheet-metal bowl for process and repair discussion.

The YouTube embeds are externally hosted and retain their publishers' terms. No Sofatutor content is used.

Glossary

Term	Practitioner meaning in this module
Annealing	Controlled heat treatment used, where appropriate for the alloy and process, to restore ductility or alter material condition
Blank	Starting piece of sheet from which the form is developed
Blocking	Rough preforming of sheet, often on a yielding support; sometimes used interchangeably with bossing in workshop speech
Bossing	Roughly creating volume in sheet with a mallet or hammer over a suitable support
Course	One planned path or sequence of overlapping forming blows around or across the work
Datum	Defined reference point, line, plane or axis from which dimensions are checked
Dishing	Forming a concavity in sheet, commonly by working into a hollow support; closely related to sinking
Hollow form	Three-dimensional sheet-metal object that encloses or partly encloses a volume
Planishing	Controlled finishing hammering used to refine contour and surface
Profile template	Gauge cut or formed to the required contour for repeated shape checking
Raising	Developing a higher-walled sheet-metal form through successive controlled hammering against suitable support
Raising hammer	Hammer whose face and balance are suited to controlled raising blows
Rim	Edge around the opening of a bowl, vessel or other hollow form
Sinking	Forming sheet into a hollow by driving it into a concave or yielding support
Stake	Shaped support, commonly steel, used beneath sheet during forming and planishing
Stake plate	Heavy plate or stand that securely holds interchangeable stakes
Springback	Elastic return that occurs after a forming load is removed
Synclastic	Curvature in which the principal curves turn in the same sense, as on a bowl or dome
Anticlastic	Curvature in which the principal curves turn in opposite senses, as on a saddle-like surface
Work hardening	Increase in hardness and strength, with reduced ductility, caused by plastic deformation

Reflection

Use these prompts in a learning journal or tutorial discussion.

Reflection prompt	Your evidence
Which single measurement would reveal loss of symmetry earliest in your planned form?
How does your selected stake radius support the next intermediate profile rather than only the final profile?
Which hazard in your plan should be eliminated or engineered out instead of relying mainly on PPE?
What evidence would tell you that continued cold forming is no longer the correct next step for the material?
Where could better blank development save both material and finishing time?
What would you change in your plan so that another craftsperson could reproduce your result?

Interactive Tasks

Quiz: Test Your Knowledge

Which source takes precedence if this course conflicts with a current authorised workplace safe system of work? (The current authorised workplace safe system of work) (!This course because it is educational) (!A video from another country) (!A personal shortcut used on a previous job)

What is the most important geometric factor when choosing a stake for a raising stage? (The stake contact shape and radius relative to the planned profile) (!The paint colour of the stake stand) (!The age of the stake) (!The number of hammers on the bench)

What usually happens to many metals during repeated cold plastic deformation? (They work harden) (!They automatically anneal) (!They become chemically pure) (!They lose all springback)

Which process is specifically intended to develop a higher-walled form through controlled hammering against a support? (Raising) (!Polishing) (!Drilling) (!Sawing)

What condition is normally required of a hammer face used for a clean planned finish? (It is clean and free from unwanted damage) (!It has sharp random burrs) (!It is covered with loose abrasive grit) (!It has an unsecured head)

Which check best helps control the developing contour of a bowl? (Comparing the work with a labelled profile template) (!Counting only the total hammer blows) (!Weighing the hammer after each course) (!Measuring the workshop door)

Which statement best reflects PUWER planning for work equipment? (Equipment should be suitable maintained and used by properly instructed or trained people) (!Any available tool may be used if the job is urgent) (!Inspection is unnecessary for hand tools) (!Training is optional when equipment is familiar)

What is the correct aim of COSHH planning for relevant dusts fumes gases or liquids? (Control exposure adequately using suitable measures) (!Rely only on opening a door) (!Ignore small quantities in every circumstance) (!Replace labels with workshop nicknames)

Which action most directly supports resource-efficient metalworking? (Keep clean scrap separated by alloy for reuse or recycling) (!Mix all metal offcuts in one contaminated bin) (!Trim the blank to final size before major forming) (!Reheat the work on a fixed schedule whether needed or not)

What should you do if a crack or closing fold begins to develop during forming? (Stop and review the cause before continuing) (!Hammer harder until the mark disappears) (!Continue without measuring) (!Grind the defect while the work is still moving)

Memory Game

Raising	Develops a higher wall by controlled forming against firm support
Sinking	Creates a hollow by working sheet into a concave or yielding support
Planishing	Refines contour and surface with light controlled finishing blows
Stake	Provides shaped local support beneath the work
Course	Describes one planned path of overlapping forming blows
Annealing	Restores ductility when the material and approved procedure require heat treatment
Profile template	Checks the developing contour against the target shape
Work hardening	Describes increased hardness caused by plastic deformation

Drag and Drop

Match the correct terms.	Topic
Raising hammer	Controlled angled blows during raising
Mushroom stake	Support for broad curved surfaces
Profile template	Checks the target contour
Bossing mallet	Rough preforming on a yielding support
Planishing hammer	Light finishing blows on close support

Match each tool or gauge to its main planning function. In a real workshop, exact suitability still depends on the geometry, material, condition and authorised procedure.

Crossword Puzzle

Raising	Which forming process develops higher walls through successive controlled hammering against support?
Planishing	Which finishing process refines contour and surface with light controlled blows?
Annealing	Which heat treatment may restore ductility when required by the material and process?
Stake	Which shaped support is placed beneath sheet during many forming operations?
Template	Which simple gauge can compare a developing wall with a target profile?
Symmetry	Which quality describes balanced geometry around an intended axis?

LearningApps

Cloze Text

Open-Ended Tasks

Easy

Planning sketch: Create an annotated sketch of a shallow raised bowl showing the datum, target profile, rim, likely intermediate shapes and planned inspection points; explain your choices in professional workshop English.
Tool identification: Produce an image-based tool-identification sheet from approved workshop tools, naming each hammer, mallet, stake or gauge and stating one suitability check without using damaged equipment.
Material comparison: Create a one-page comparison card for trainer-approved copper and low-carbon steel sheet covering forming behaviour, likely work-hardening response, surface considerations and information that must be confirmed before heating.
Risk control map: Turn one supervised raising workstation into a hazard-and-control diagram showing sharp edges, impact, noise, posture, tool security and any heat or fume zones identified by the current workplace assessment.

Standard

Profile template: Produce a scaled or full-size profile template from a supplied drawing, mark the datum and orientation clearly, then demonstrate how you would use it at three planned checkpoints without carrying out hazardous work unsupervised.
Craft interview: Interview a practising blacksmith, silversmith, coppersmith or artistic metalworker about how they plan a hollow form; compare their terminology and sequence with this module while keeping any non-UK legal or training context explicitly labelled.
Process storyboard: Create a photo storyboard or short video explaining the planned route from blank to raised form, including tool changes, measurement points and supervisor hold points; practical footage must be recorded only under authorised supervision.
Trial log: Under trainer-authorised workshop conditions, compare two approved intermediate-forming strategies on test pieces and record tool selection, measurements, surface effects, time, material response and the decision you would carry into the final job.

Advanced

Complex hollow form: Develop a complete process plan for a more complex hollow form with changing radii, identifying access limits, intermediate profiles, tool changes, quality gates and contingency actions for distortion.
Sustainability audit: Audit a supervised forming workflow for material yield, scrap separation, rework, tool maintenance, consumables and energy use, then propose improvements that do not weaken safety or quality controls.
Safe system review: Critique a trainer-supplied raising plan against current official guidance and workplace procedures, identifying where elimination, engineering or administrative controls could reduce reliance on PPE; submit the critique for competent expert review.
Quality assurance dossier: Build an expert-review dossier for a client-style raised-metal commission containing the interpreted brief, material record, blank-development rationale, process map, risk-control summary, gauges, quality criteria, inspection record and a justified plan for handling nonconformities.

Learning Assessment

Process selection assessment: Given a drawing for a shallow copper vessel, justify where you would use sinking, raising and planishing and explain what evidence would make you alter the sequence.
Defect diagnosis assessment: Analyse photographs or trainer samples showing a wavy rim, fold, crack and deep hammer mark, identify plausible causes and propose safe corrective decisions rather than cosmetic fixes alone.
Risk-control assessment: Produce a control plan for a raising workstation and justify at least one elimination or engineering measure before discussing PPE.
Material and tooling assessment: Select a starting material condition, hammers, stakes, gauges and inspection methods for a supplied job brief and defend each choice against geometry, material behaviour and finish.
Quality assessment: Inspect a completed supervised practice form against a drawing and profile template, record measurable deviations and decide which are acceptable, repairable or cause for rejection.
Transfer assessment: Adapt your planning method from a shallow bowl to a taller or non-axisymmetric hollow form, identifying which assumptions no longer hold and what additional trials, tools, access checks or risk controls are required.

Evidence of Learning

Evidence type	What strong evidence looks like
Knowledge	Accurate distinction between raising, sinking, bossing, annealing and planishing; understanding of work hardening, tool-support geometry, relevant hazards and quality criteria
Planning skill	A coherent sequence from drawing to blank, intermediate profiles, tools, controls, measurement points and finishing stages
Practical preparation skill	Correct supervised identification and inspection of tools, secure workstation setup, accurate profile-gauge use and clear stop or escalation decisions
Safety reasoning	Controls chosen through the hierarchy, with reference to current workplace assessments, PUWER, COSHH and other relevant official guidance rather than reliance on PPE alone
Quality product	A trainer-authorised practice form that meets agreed dimensional, profile, surface and defect criteria with an auditable inspection record
Technical record	Drawing notes, material identification, process plan, risk-control summary, check sheets, measurements, deviations and approvals written so another competent person can follow the reasoning
Sustainability evidence	Reduced avoidable scrap and rework, separated clean offcuts, justified heating and consumable use, and maintenance actions that extend tool life
Transfer achievement	Ability to adapt the planning logic to a different alloy, wall profile or hollow-form geometry while explicitly checking which process, safety and quality assumptions must change

OERs on the Topic

The English Wikipedia article on raising provides an openly accessible starting point for wider reading. Use it as background and verify safety, training and standards requirements against the current UK and workplace sources listed earlier.

Useful openly accessible and official reference points include:

Wikimedia Commons — Metalworking: Openly licensed images for tool, process and object study; check each individual file licence.
Wikipedia — Raising: Introductory background on raising and related processes.
HSE — PUWER overview: Current work-equipment guidance.
HSE — COSHH: Current hazardous-substance guidance.
Skills England — Blacksmith ST0378 v1.1: Current England apprenticeship-standard reference as checked for this edition.

Expert Review Checklist

Before this module is adopted for teaching, an expert reviewer should confirm:

Technical review: Raising, sinking, bossing and planishing terminology matches the intended UK workshop and any local teaching conventions are noted.
Material review: Example alloys, thicknesses and annealing statements match the actual stock, manufacturer data and provider procedures.
Safety review: Current risk assessments, COSHH assessments, PUWER arrangements, noise controls, hot-work rules, emergency arrangements and PPE selection are correct for the teaching site.
Equipment review: Images and videos do not imply that a tool, stake mounting method or posture is acceptable merely because it appears in media.
Training review: Skills England references remain current and no statement is presented as automatic equivalence to another UK nation or country.
Accessibility review: Instructions, demonstrations, stop signals, workstation setup and assessment methods are accessible without reducing required competence or safety.
OER review: Media filenames, source URLs, attribution and licences remain valid; replacement media must be similarly verifiable and openly reusable where possible.

Linked Learning Areas

Raising sheet metal into surfaces and hollow forms

This module links craft practice with Materials science, Engineering drawing, Occupational safety and health, Design, Sustainable manufacturing, Quality assurance and Vocational education. It is particularly relevant to blacksmiths, artistic metalworkers, silversmiths, coppersmiths, restoration metalworkers and learners who develop three-dimensional forms from sheet.

aiMOOC Projects

Diesen aiMOOC als Battle spielen: Englisch, Klasse 5-6, G-Niveau

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