Quelltext der Seite English:Raising sheet metal into surfaces and hollow forms — Fundamentals

{{T}}
[[Category:English]]
[[Category:Raising sheet metal into surfaces and hollow forms — Fundamentals]]

{{BR}}
= Introduction =

'''Raising sheet metal into surfaces and hollow forms — Fundamentals''' introduces the hand-forming principles used to turn flat sheet into controlled three-dimensional surfaces and hollowware. It is written for vocational learners in blacksmithing, artistic metalwork, silversmithing and related craft-metal workshops. You will learn how a sheet moves under controlled hammer blows, how a stake supports that movement, how raising differs from sinking and planishing, how to inspect shape and surface quality, and how to work within a supervised safe system.

This module uses the practitioner vocabulary current in England: '''raising''', '''hand raising''', '''raising hammer''', '''raising stake''', '''course''', '''blocking''', '''sinking''', '''bouging''', '''planishing''', '''work hardening''', '''annealing''', '''hollowware''' and '''profile template'''. Heritage Crafts lists raising, sinking, hammer forming and planishing among silversmithing processes, and the Goldsmiths' Centre uses the terms hand-raising, hammering, blocking and planishing in current technical-skills training.

[[File:Silversmithing anvils and hammers.jpg|500px|frameless|center]]

''Open-media note: this Wikimedia Commons image shows stakes and hammers used by British silversmith Robert Stone. The file page gives the licence and attribution details.''

{{#ev:youtube|https://www.youtube.com/watch?v=IF3hbmX2cdI|500|center}}

''United Kingdom media reference: the Victoria and Albert Museum follows silversmith Ndidi Ekubia and shows raising, traditional tools and later surface development. Watch it as an expert demonstration, not as a substitute for your workshop's training, risk assessment or supervision.''

'''Learning outcomes.''' By the end of this module, you should be able to explain the mechanics of raising, distinguish raising from related sheet-forming operations, identify suitable tools and materials, prepare a supervised work sequence, place consistent raising courses, recognise signs of work hardening and emerging defects, judge a basic raised form against quality criteria, and suggest safer and more resource-efficient ways to organise the work.

'''Level and setting.''' The module suits introductory to early-intermediate vocational study. Practical hammer work must take place in a properly equipped workshop under competent supervision. It is not a licence to undertake hot work, powered grinding, polishing, annealing, chemical pickling or any other hazardous process without separate training and authorisation.

{{BR}}
= Course Metadata =

{| class="wikitable"
! Field
! Value
|-
| Exact title
| Raising sheet metal into surfaces and hollow forms — Fundamentals
|-
| Parent topic
| Raising sheet metal into surfaces and hollow forms
|-
| Module
| Fundamentals
|-
| Target language
| English
|-
| Intended learners
| Vocational learners in blacksmithing, artistic metalwork, silversmithing and related craft-metal training
|-
| Selected jurisdiction
| England, United Kingdom
|-
| Safety authority used
| Health and Safety Executive guidance for Great Britain, applied to workplaces in England
|-
| Vocational-training authority used
| Skills England
|-
| Standards authority used
| BSI, the UK National Standards Body
|-
| Expert-review date
| 1 September 2026
|-
| Open licence for original course text
| Creative Commons Attribution-ShareAlike 4.0 International, with third-party media retaining their own licences and terms
|}

{{BR}}
= Jurisdiction, Training Context and Authority =

'''Selected jurisdiction: England, United Kingdom.''' This course is scoped to learners and workplaces in England. Health and Safety Executive guidance cited here applies in Great Britain and therefore in England. Apprenticeship information is labelled '''England''' because vocational-training arrangements differ within the United Kingdom. BSI information is labelled '''United Kingdom''' because BSI is the UK National Standards Body. Northern Ireland is outside the legal scope of this module.

'''Great Britain occupational safety, applied in England.''' HSE states that work equipment must be suitable, maintained in a safe condition and used by people who have adequate information, instruction and training under PUWER. HSE also requires risks from hazardous substances to be prevented or adequately controlled under COSHH, requires employers to manage harmful noise exposure, and requires hazardous manual handling to be avoided where reasonably practicable or otherwise assessed and reduced. PPE is a residual control: if the risk assessment shows it is needed, employers must provide suitable PPE free of charge.

'''England vocational training.''' Skills England lists the Blacksmith apprenticeship standard ST0378, version 1.1, as approved for delivery at Level 3. Its occupational profile covers designing, shaping and joining metal for bespoke, artistic, architectural and heritage work. Its knowledge and skills include safe working, tools, materials, bench work, hot forging, finishing, quality and interpretation of specifications. This aiMOOC supports those broad capabilities but '''does not claim that raising is a separately assessed apprenticeship outcome, does not award a qualification, and does not replace an apprenticeship programme or end-point assessment'''.

'''United Kingdom standards.''' BSI is the UK National Standards Body. Standards are normally consensus documents and are typically voluntary unless a contract, specification or legal framework makes a particular requirement relevant. For workshop equipment, PPE, safety signs, product specifications or client quality requirements, use the current BSI catalogue and your organisation's controlled documents. This course does not invent a British Standard for the hand skill of raising.

'''Priority rule.''' Current legislation, HSE guidance, manufacturer instructions, employer risk assessments, method statements, training-provider rules and workplace instructions take precedence over this educational text. Stop and ask a competent supervisor whenever there is a conflict or uncertainty.

'''No cross-country equivalence.''' Nothing in this module claims automatic equivalence with apprenticeships, licences, safety duties, standards, job titles or certifications in Ireland, the United States, Canada, Australia, New Zealand, South Africa or any other country.

{{BR}}
= Why Raise Sheet Metal? =

Raising lets a maker create a hollow form from a single sheet rather than assembling the entire form from separate pieces. In silversmithing and coppersmithing this is a traditional route to bowls, cups, beakers, vases and sculptural vessels. In artistic metalwork, the same understanding of supported hammer forming helps you control shallow shells, curved panels, bosses and transition surfaces. In blacksmithing, it complements rather than replaces hot forging: the material begins as sheet, and the geometry is developed through planned deformation rather than by drawing out bar stock.

A raised vessel can be functional, sculptural or both. The visible hammer texture may be retained as an intentional finish, blended by planishing, or prepared for later decorative processes. The important vocational principle is that the form is not achieved by random denting. A competent maker controls support, strike position, blow direction, overlap, course spacing, material condition and inspection.

[[File:55ConcursoDomingoRamos048.JPG|500px|frameless|center]]

''This Wikimedia Commons image shows a hand-hammered copper vase from Santa Clara del Cobre. It is a useful visual example of how repeated hammer work can build a hollow form; it is not evidence of UK training or legal requirements.''

{{BR}}
= Core Concepts =

{{BR}}
== Raising ==

'''Raising''' is the progressive formation of a three-dimensional hollow form by hammering sheet against a supportive stake or similar solid form. The work is normally rotated so that blows form a controlled path around the circumference. One complete pass around the work is commonly called a '''course''' or '''round'''. A sequence of courses changes the wall angle and height in small increments.

In classical hand raising, the sheet is compressed circumferentially as the form is driven upward and inward. Good technique avoids trying to make the full shape in one pass. The maker repeatedly moves a manageable amount of metal, checks the profile, and then continues.

{{BR}}
== Sinking and Blocking ==

'''Sinking''' or '''blocking''' creates a depression by hammering the sheet into a hollow support such as a wooden block, stump hollow, sandbag or other approved former. The sheet stretches locally. For many teaching methods, a shallow blocked bowl provides a stable starting shape for later raising.

Raising and sinking are related but not interchangeable. Sinking tends to stretch a surface into a depression; raising primarily reorganises the wall by supported compression. A real vessel may use both processes at different stages.

{{BR}}
== Bouging ==

'''Bouging''' is the smoothing and evening of a raised form with a relatively soft tool such as a wooden, rawhide or suitable polymer mallet over a matching support. It can remove waves and angular transitions without introducing the same sharp marking that a hard steel hammer may create. The exact tool and sequence depend on the material and workshop tradition.

{{BR}}
== Planishing ==

'''Planishing''' uses controlled, usually lighter overlapping blows from a smooth polished hammer against a smooth stake to refine the surface, blend earlier hammer marks and improve geometric accuracy. Planishing is not a substitute for sound raising. If the underlying profile is wrong, planishing can make the surface shinier without correcting the geometry.

{{BR}}
== Work Hardening and Annealing ==

Cold working increases resistance to further deformation. In copper, brass, silver and many other metals this is experienced as '''work hardening''': the sheet feels springier or harder to move, and continued forcing can encourage cracking. '''Annealing''' restores ductility by a material-specific heat treatment.

Annealing introduces fire, hot-metal, fume, quenching and possibly chemical-cleaning hazards. It is therefore a separate controlled operation. '''Do not infer torch settings, temperatures or quench instructions from this module. Learners must use only an approved workshop annealing procedure under competent supervision.''' Unknown, painted, plated or galvanised sheet must not be heated without an appropriate material and COSHH assessment.

{{BR}}
== Springback and Elastic Recovery ==

After a blow, some metals recover slightly toward their previous shape. This is '''springback'''. It varies with alloy, thickness, degree of work hardening and local geometry. You control it by making small, repeatable corrections and checking often rather than by striking much harder.

{{BR}}
= Geometry and Metal Flow =

Think of a flat circular blank as a map of material. When the wall rises, a circumference that was once part of a flat disc must occupy a smaller horizontal circle at the new height. Raising encourages that circumferential material to compress while the stake supports the local contact zone.

<pre>
                 Controlled hammer blow
                         ↓
                    [hammer face]
                         ↓
       raised wall  ____/ 
                  _/    /      Work rotates between blows
                _/_____/  ↻
                     ^
                     |
               polished stake
               fixed securely

Key idea: strike the sheet against support, not into unsupported space.
Diagram is schematic and not to scale.
</pre>

A useful mental model is '''support – strike – rotate – overlap – inspect'''. The stake provides reaction; the hammer provides controlled deformation; rotation distributes the work; overlap avoids isolated dents; inspection keeps the changing surface on the intended path.

{{BR}}
= Tools and Workshop Equipment =

[[File:Silversmithing anvils and hammers.jpg|500px|frameless|center]]

A vocational raising station may include the following equipment. Exact tool forms vary between silversmithing, coppersmithing and artistic blacksmithing workshops.

{| class="wikitable"
! Tool or equipment
! Main purpose
! Quality and safety points
|-
| Raising hammer
| Places controlled compressive blows during raising
| Face and edges should be correctly dressed for the process; a damaged face can mark or cut the work
|-
| Planishing hammer
| Blends and refines the surface
| Face must be smooth and appropriate to the intended finish
|-
| Blocking or sinking mallet
| Starts or adjusts a shallow dish in a suitable hollow support
| Use the approved material and face condition for the sheet being formed
|-
| Raising stake
| Supports the sheet immediately under the hammering zone
| Must be the correct profile and securely held; never improvise an unstable support
|-
| Mushroom or rounded stake
| Supports broad curves and planishing
| Match the local curve so that the work is fully supported
|-
| Stake holder or secure vice system
| Holds the stake
| Must be stable and arranged so that the work cannot loosen the stake
|-
| Dividers, compass or scriber
| Marks centre and course guides
| Sharp points are controlled tools; store and carry them safely
|-
| Profile template
| Compares the work with the intended section
| Use a labelled datum so the same position is checked each time
|-
| Steel rule, calipers or suitable gauge
| Checks diameter, height and selected dimensions
| Use only where safe to do so and avoid measuring across sharp unfinished edges
|-
| Deburring and finishing tools
| Remove sharp edges and prepare surfaces
| Powered grinding or polishing requires separate authorisation, guarding, extraction and training
|}

[[File:Blacksmith anvil hammer.svg|500px|frameless|center]]

''The anvil-and-hammer symbol is a general blacksmithing image from Wikimedia Commons. Raising uses more specialised hammers and stakes than this simplified symbol suggests.''

{{BR}}
= Materials =

'''Copper''' is widely used for training and hollowware because it is ductile, visibly records hammer blows and demonstrates work hardening clearly. It is often a good practice material when the workshop has an approved annealing system.

'''Low-carbon steel sheet''' connects the technique to blacksmithing and artistic metalwork. It is stronger than typical copper practice sheet, edges can be aggressive, and forming loads may be higher. Cold sheet raising is distinct from hot sheet forging; if heat is introduced, the job moves into a different risk-control regime.

'''Brass''' can be raised, but alloy and temper matter. Some brasses are less forgiving of repeated cold work than copper. Material identification and an approved annealing schedule are essential before thermal treatment.

'''Silver and other precious metals''' are traditional hollowware materials. Their cost, traceability, hallmarking context and finishing expectations make them unsuitable for casual first attempts. Training commonly develops control in less costly sheet before valuable material is used.

'''Material identification matters.''' Do not heat unknown, coated, plated or galvanised metal. Coatings can decompose or produce harmful fumes. Use supplier data, material records and your workplace's COSHH process.

{{BR}}
= Authentic UK Practice Examples =

The Victoria and Albert Museum describes '''raising''' as shaping flat sheet into three-dimensional form by heating and hammering over a solid surface such as an anvil or shaped stake. Its collection includes Ndidi Ekubia's silver ''Sparkle Vase'', a contemporary example in which raising is combined with later surface development.

The Goldsmiths' Centre's 2026 silversmithing technical-skills training uses the terms '''hand-raising, hammering, blocking and planishing'''. Its course description treats these as core forming methods for larger silverware and sculptural work.

Heritage Crafts describes silversmithing hollowware as including bowls, cups and candlesticks and lists '''raising, hammer forming, sinking and planishing''' among recognised sub-crafts and techniques.

{{#ev:youtube|https://www.youtube.com/watch?v=IF3hbmX2cdI|500|center}}

''Country label: United Kingdom. Use this V&A video for craft observation. The demonstrator's studio method does not override your employer's safe system of work.''

{{#ev:youtube|https://www.youtube.com/watch?v=yawQP474RF0|500|center}}

''Country label: United States. The Art League video gives a clear visual example of a first raising round on copper. It is included only for technique observation. US training and legal arrangements are not transferred into this England-scoped module.''

{{BR}}
= Risk Controls for Raising Work =

Raising is manual craft work, but it is not low-risk by default. Repeated hammering combines impact, sharp sheet edges, awkward hand positions, noise and the possibility of damaged or unstable tools. Later operations may add heat, chemicals, abrasive dust or rotating machinery. Your workplace risk assessment decides the controls.

{| class="wikitable"
! Hazard
! Typical route to harm
! Preferred control approach
|-
| Hammer impact
| Struck fingers, hands or nearby people
| Adequate training, clear striking zone, correct tool size, stable support, controlled rhythm and supervision
|-
| Sharp or burred sheet edge
| Cuts and lacerations
| Deburr before forming, handle deliberately, store blanks safely and use task-appropriate hand protection where the risk assessment requires it
|-
| Loose stake or unstable holder
| Ejection, sudden movement or loss of control
| Inspect and secure the stake before work; stop immediately if movement is detected
|-
| Flying fragments or scale
| Eye or face injury
| Maintain tools and material, control the work zone and use suitable eye protection where the risk assessment requires it
|-
| Repeated impact noise
| Hearing damage
| Assess exposure, reduce noise at source, separate noisy work and use hearing protection where required by the noise assessment
|-
| Repetition and awkward posture
| Upper-limb or musculoskeletal strain
| Set an appropriate working height, keep the work close, vary tasks, schedule recovery and seek ergonomic adjustments
|-
| Heavy stakes, blocks or sheet
| Manual-handling injury
| Avoid hazardous handling where reasonably practicable; use mechanical or team assistance and plan the route
|-
| Grinding, polishing or abrasive finishing
| Dust, sparks, entanglement and noise
| Separate trained operation with guarding, extraction, correct setup and PPE; never improvise
|-
| Annealing or hot work
| Burns, fire, fume and hot-metal contact
| Separate approved hot-work procedure, competent supervision, ventilation and verified material identity
|-
| Pickling, degreasing, patination or coatings
| Chemical exposure
| COSHH assessment, safer substitution where possible, suitable containment or LEV, approved storage and task-specific PPE
|}

'''PPE is not the first control.''' HSE's approach is to remove or reduce risk through design, equipment, extraction, safe systems and supervision before relying on PPE. Eye protection, hearing protection, safety footwear, gloves or RPE may be required by your risk assessment, but the correct type must be selected for the actual hazard. Gloves that are useful for carrying sharp sheet may be unsuitable near rotating equipment.

'''Noise.''' HSE's lower exposure action value for daily or weekly noise exposure is 80 dB(A), and the upper exposure action value is 85 dB(A). Do not guess exposure from how loud a task feels; workplace assessment and measurement determine required controls.

'''Hand-arm vibration.''' Hand hammers and powered tools create different exposure patterns. Where powered grinders, sanders or other vibrating machinery are used, the workplace must assess HAV exposure and keep it controlled. Do not treat a hand-raising lesson as permission to use powered tools.

{{BR}}
= Before You Begin: Supervised Setup Check =

Before practical work, you and the supervisor should confirm that the job brief and approved method are understood; the sheet grade, thickness and condition are known; the blank is free of dangerous burrs; the hammer face is sound; the selected stake matches the intended profile; the stake holder is stable; the work area is clear; nearby people are outside the striking zone; required PPE is available and fits correctly; lighting and working height are adequate; and any later annealing, polishing or chemical process has a separate authorised procedure.

A learner should be able to say '''what the next operation is, what could go wrong, what control is in place, and what condition would make them stop'''.

{{BR}}
= Step-by-Step Demonstration: First Raising Courses on a Practice Bowl =

'''Demonstration scope.''' This is a supervised cold-forming demonstration using an instructor-selected, known sheet material. It assumes that the circular practice blank has been cut, identified and safely deburred. If the material requires annealing between stages, that is carried out only under the workshop's separate approved procedure. Do not use these steps as stand-alone permission for hot work.

# '''Read the drawing and identify the target profile.''' Mark the centre and establish the diameter, height and curvature that the practice piece is meant to approach. Keep a profile template at the station.
# '''Inspect the station.''' Check hammer face, handle, stake surface, holder stability, floor condition, lighting, work clearance and required PPE. Report defects; do not use damaged equipment.
# '''Mark course guides.''' With the blank supported safely, use dividers or an approved marking method to establish concentric guides. These are reference lines for consistency, not decoration.
# '''Create or confirm the starting dish.''' If the teaching method uses blocking, the instructor demonstrates a shallow, even dish in the approved former so that the blank sits predictably on the raising stake.
# '''Set the sheet against the stake.''' The instructor demonstrates how the local wall is fully supported at the strike point. The exact angle depends on stake profile, material and target form.
# '''Place the first raising course.''' Use controlled overlapping blows while rotating the work so that the course progresses evenly around the circumference. Keep the hammering rhythm deliberate; isolated heavy blows are not a shortcut.
# '''Complete the round and inspect.''' Stop after the full course. Check rim behaviour, wall angle, waviness, symmetry and any deep marks. Compare the section with the template rather than relying only on visual memory.
# '''Even the form if required.''' The supervisor may specify bouging or light mallet work over a suitable support to reduce waves before the next raising course.
# '''Monitor material condition.''' If resistance rises sharply, springback increases, or incipient cracking appears, stop. The supervisor decides whether the work needs annealing or another correction. Never respond by simply hitting harder.
# '''Repeat controlled courses.''' Continue in small increments, checking after each course. The teaching sequence may work from the centre outward or use another recognised method; follow the method demonstrated in your workshop consistently.
# '''Approach final geometry gradually.''' As the shape nears the drawing, reduce correction size. Match the stake more closely to the local contour and avoid chasing a dimension by distorting another.
# '''Planish only after the form is sound.''' With clean, polished tools and adequate support, use light overlapping blows to blend the surface and refine the profile. Stop if the sheet begins to mark, thin locally or lose the intended texture.
# '''Finish the edge under the approved process.''' Remove burrs or sharpness without changing the target rim line. Powered finishing is a separate trained operation.
# '''Inspect and record.''' Measure height, rim diameter and selected profile points. Record cracks, folds, deep tool marks, asymmetry and surface condition. A learning piece is successful when its evidence shows controlled improvement, not merely when it looks shiny.

{{#ev:youtube|https://www.youtube.com/watch?v=YAufcYn83Gg|500|center}}

''Country label: United States. This video shows a later stage of raising and setting a rim. Compare the sequence with your England-based workshop method, but do not import US legal or training assumptions.''

{{BR}}
= Common Errors and Corrections =

{| class="wikitable"
! Symptom
! Likely cause
! Better response
|-
| Faceted or lumpy wall
| Blows are too isolated, overlap is inconsistent or support does not match the surface
| Slow down, restore even overlap and use the correct stake contour
|-
| Rim becomes wavy
| Circumference is not being reduced evenly or courses are uneven
| Stop, inspect the full rim, identify high and low regions and correct gradually under supervision
|-
| Deep half-moon hammer marks
| Hammer edge is contacting the sheet or hammer face is poorly dressed
| Stop and inspect the hammer; do not try to erase a deep mark by repeated heavy planishing
|-
| Local flat spot
| The stake support is too flat for the intended curve or the work is held at an inconsistent angle
| Change to a better-matched support and blend the transition progressively
|-
| Split or edge crack
| Material has work-hardened, a burr or notch acts as a stress raiser, or deformation is too severe
| Stop; do not hammer the crack closed. Escalate for material and process review
|-
| Form twists or becomes asymmetric
| Course spacing, rotation or strike position is biased to one side
| Return to datums and templates, compare opposite quadrants and correct in small increments
|-
| Surface remains rough after planishing
| Dirt, scale, damaged tool faces or gaps between blows are being transferred into the metal
| Clean the work and tools, check surface condition and resume only with suitable support and light controlled overlap
|-
| Learner becomes fatigued and starts missing
| Work height, grip, pace or session length is unsuitable
| Stop, reset posture and task plan, and use a different work-rest pattern rather than forcing the pace
|}

{{BR}}
= Quality Criteria =

A sound beginner raised form should be judged against a drawing or agreed sample, not against vague impressions. Typical criteria include:

{| class="wikitable"
! Criterion
! What good evidence looks like
|-
| Overall profile
| The wall follows the intended section with smooth transitions and no unintended flats
|-
| Rim geometry
| Rim is reasonably level, round where specified, and close to target diameter
|-
| Symmetry or intentional asymmetry
| Opposite sections agree where symmetry is required; deliberate asymmetry follows the design
|-
| Surface
| Hammer texture is deliberate and consistent, or planishing marks are blended to the specified finish
|-
| Integrity
| No cracks, folds, tears, sharp burrs or unsupported thin regions
|-
| Dimensions
| Height, diameter and selected profile points are within the tolerance stated in the job brief
|-
| Edge quality
| Rim is safe to handle and visually consistent with the design
|-
| Process evidence
| Inspection notes show measured decisions, corrections and safe stop points
|}

'''Quality is relational.''' A perfectly smooth bowl can still be wrong if its rim is too small, its base rocks, its wall is uneven or its surface finish does not match the brief. Likewise, visible hammer marks can be high quality when the design deliberately celebrates hand raising.

[[File:Copper Bowl with Lobster MET 1987.394.178 a.jpg|500px|frameless|center]]

''This Wikimedia Commons image shows a hammered copper bowl in the Metropolitan Museum of Art collection. Use it to discuss how tool marks, form and surface can become part of an object's visual language.''

{{BR}}
= Sustainability and Resource Efficiency =

Raising is slow, material-intensive craft work, so planning has a strong environmental and economic effect. Nest circular blanks efficiently on sheet and keep reusable offcuts segregated by known alloy. Avoid unnecessary over-thickness when the drawing and process allow a lighter gauge, but never substitute material without approval. Rework a recoverable practice piece instead of scrapping it simply because the first profile is imperfect.

Keep copper, brass, steel and precious-metal scrap streams separate so that they can be recycled without contamination. Precious-metal filings and polishing residues may have recovery value and should follow workshop collection procedures. Minimise abrasive finishing by achieving shape and surface quality during forming. Maintain smooth hammer and stake faces so that defects do not have to be ground away later.

Annealing consumes energy, and repeated overheating can damage material or create unnecessary oxide. Use only the approved material-specific cycle and batch work where the workshop procedure allows. Select lower-hazard cleaners and finishes where practical, capture dust and fume at source, and dispose of chemical residues through authorised routes rather than drains.

A durable, repairable hollow form with an intentionally maintainable finish often provides better whole-life value than a disposable decorative object. Sustainability therefore includes '''material yield, process energy, hazardous-substance control, repairability, longevity and end-of-life recycling'''.

{{BR}}
= Inclusive Workshop Practice =

Good craft teaching does not assume that every learner has the same reach, grip strength, hearing, vision or previous workshop experience. Adjust bench or stake height where possible, provide clear sight lines, use profile templates with tactile as well as visual cues where helpful, allow left- and right-handed setups that preserve the safe striking zone, and break long hammering sequences into manageable intervals.

Instructions should be available in plain English and supported by demonstration. Learners who use hearing protection still need an agreed visual or non-verbal stop signal. Do not treat asking for a different handle, lighter practice blank, rest break or alternative measurement method as a lack of commitment; the criterion is controlled competent work.

{{BR}}
= Glossary =

{| class="wikitable"
! Term
! Meaning in this module
|-
| Annealing
| A controlled heat treatment used to restore ductility after cold working; performed only under the workshop's approved procedure
|-
| Blocking
| Producing a shallow dish or preliminary shape by hammering into a suitable hollow support
|-
| Bouging
| Smoothing or evening a raised form with a comparatively soft mallet over a supportive form
|-
| Course
| One controlled pass or round of raising blows around the work
|-
| Datum
| A defined reference point, line or surface used for repeatable measurement
|-
| Hollowware
| Three-dimensional vessel work such as bowls, cups, beakers and vases
|-
| Planishing
| Refining a metal surface and profile with light controlled overlapping hammer blows over a smooth support
|-
| Profile template
| A physical comparison gauge cut to the intended section of the form
|-
| Raising
| Progressively forming sheet into a hollow three-dimensional shape over a stake using controlled hammering
|-
| Raising hammer
| A hammer with a face geometry selected for the local raising operation
|-
| Raising stake
| A solid shaped support used directly beneath the area being raised
|-
| Sinking
| Forming a depression by stretching sheet into a hollow support
|-
| Springback
| Elastic recovery that causes metal to move slightly after the forming force is removed
|-
| Work hardening
| Increased hardness and resistance to deformation produced by cold working
|}

{{BR}}
= Reflection =

Think about the last time you tried to correct a handmade object by applying more force. In raising, when would a stronger blow make the problem worse? Describe what evidence would tell you to change the support, change the course spacing, anneal under supervision, or stop and ask for advice.

Consider surface finish as a design decision. When should hammer marks remain visible as evidence of process, and when should they be blended by planishing? Explain your answer in relation to function, client brief, historical context and maintenance.

Finally, identify one way your workshop could reduce waste or physical strain without lowering craft quality. Be specific about the part of the workflow that would change.

{{BR}}
= Interactive Tasks =

{{BR}}
== Quiz: Test Your Knowledge ==

{{MC}}

'''What best distinguishes raising from sinking?'''
(Raising forms sheet over support by progressive controlled compression)
(!Raising removes metal with an abrasive wheel)
(!Sinking always joins two sheets with a seam)
(!Sinking is the final polishing stage)

{{E}}
<br>

{{MC}}

'''What is a course in hand raising?'''
(A complete pass of controlled blows around the work)
(!A heat treatment for softening metal)
(!A gauge used to measure wall thickness)
(!A chemical used for removing oxide)

{{E}}
<br>

{{MC}}

'''What is the main purpose of planishing?'''
(To refine the surface and profile with light supported blows)
(!To cut the blank to diameter)
(!To weld a seam closed)
(!To test electrical continuity)

{{E}}
<br>

{{MC}}

'''What does work hardening usually indicate during cold raising?'''
(The metal is becoming more resistant to further deformation)
(!The sheet has automatically returned to its original temper)
(!The stake has become softer than the sheet)
(!The profile template has changed size)

{{E}}
<br>

{{MC}}

'''Which observation is a strong reason to stop raising and seek supervision?'''
(A crack beginning at the rim)
(!A clear centre mark on the blank)
(!A labelled profile template)
(!An even course of overlapping blows)

{{E}}
<br>

{{MC}}

'''Why must a raising stake be secured?'''
(To prevent sudden movement and loss of control)
(!To make the sheet chemically softer)
(!To replace the need for eye protection)
(!To guarantee a polished final surface)

{{E}}
<br>

{{MC}}

'''Which statement has priority over this aiMOOC in an England workshop?'''
(The current employer risk assessment and workplace instruction)
(!A foreign video with a different legal context)
(!An unverified social media comment)
(!A learner preference that conflicts with safety controls)

{{E}}
<br>

{{MC}}

'''What is the best response when the work resists more strongly and springback increases?'''
(Stop and assess material condition before continuing)
(!Strike much harder until the metal moves)
(!Ignore the change and increase speed)
(!Remove the stake so the sheet can flex freely)

{{E}}
<br>

{{MC}}

'''Which action most directly improves material efficiency?'''
(Nesting blanks and segregating reusable alloy offcuts)
(!Grinding away every visible hammer mark)
(!Discarding every imperfect practice piece)
(!Mixing all scrap metals in one container)

{{E}}
<br>

{{MC}}

'''A raised bowl is smooth but the rim is oval when the drawing requires roundness. What does this show?'''
(Surface finish alone does not prove geometric quality)
(!Planishing automatically guarantees dimensional accuracy)
(!An oval rim is always acceptable in vocational work)
(!Measurement is unnecessary after finishing)

{{E}}
<br>

{{BR}}
== Memory Game ==

<div class="memo-quiz">
{|
|-
| Raising || Progressive hammer forming of sheet over a solid support
|-
| Sinking || Forming a depression by stretching sheet into a hollow support
|-
| Planishing || Refining surface and profile with light overlapping blows
|-
| Course || One complete controlled pass around the work
|-
| Work hardening || Increased resistance to deformation after cold working
|-
| Stake || Solid shaped support beneath the hammering zone
|-
| Springback || Elastic recovery after forming force is removed
|-
| Hollowware || Vessel forms such as bowls, cups and vases
|}
{{E}}
<br>

{{BR}}
== Drag and Drop ==

<div class="lueckentext-quiz">

{| class="wikitable"
! Match the correct terms.
! Topic
|-
| '''Secure stake'''
| Prevents support movement during hammering
|-
| '''Profile template'''
| Checks the intended section of the form
|-
| '''Overlapping blows'''
| Help create a continuous controlled course
|-
| '''Stop and inspect'''
| Appropriate response to a developing crack
|-
| '''Segregated scrap'''
| Supports efficient material recycling
|}
{{E}}

<br>
...
<br />

{{BR}}
== Crossword Puzzle ==

<div class="kreuzwort-quiz">
{|
|-
| Raising || What process progressively forms sheet into a hollow vessel over a support?
|-
| Planishing || What finishing hammer process blends and refines a formed surface?
|-
| Stake || What solid shaped support sits beneath the hammering zone?
|-
| Annealing || What controlled heat treatment restores ductility after cold work?
|-
| Hollowware || What term covers vessel work such as bowls, cups and vases?
|-
| Course || What word means one controlled pass of raising blows around the work?
|}
{{E}}
<br>

{{BR}}
== LearningApps ==

<iframe> https://learningapps.org/index.php?s=Raising+sheet+metal+into+surfaces+and+hollow+forms+Fundamentals </iframe>

{{BR}}
== Cloze Text ==

<quiz display=simple>
{'''Complete the text.'''<br>
|type="{}"}
Raising moves sheet into a three-dimensional form over a solid { stake }. A complete controlled pass around the work is called a { course }. Sinking differs because it mainly forms a depression by { stretching }. Light supported finishing blows are used for { planishing }. Repeated cold working can cause { work hardening }. When a crack begins, the correct response is to { stop }. The target section can be checked with a { profile template }. A loose support creates an avoidable { hazard }. Scrap should be separated by known { alloy }. Official workplace instructions always take { precedence } over this learning text.
</quiz>

<br>

{{BR}}
= Open-Ended Tasks =

{{BR}}
=== Easy ===
# [[English:Raising process map|Raising process map]]: Create a one-page illustrated process map from blank inspection to final quality check, showing where supervision or a stop decision is required.
# [[English:Tool identification|Tool identification]]: Photograph or sketch five approved tools at your training centre, label each tool's raising function, and ask your instructor to verify the terminology before sharing the sheet.
# [[English:Surface comparison|Surface comparison]]: Compare a deliberately hammered sample with a planished sample and write 150 words on how texture changes visual character, light reflection and maintenance.
# [[English:Safety observation|Safety observation]]: Observe a supervised raising station without operating it and record three effective risk controls and one possible ergonomic improvement.

{{BR}}
=== Standard ===
# [[English:Practice bowl documentation|Practice bowl documentation]]: Under direct workshop supervision, make a small approved practice form and keep a process log with course sequence, inspection points, corrections and reasons for every stop.
# [[English:Profile template project|Profile template project]]: Produce a safe profile template from a supplied drawing, define its datum, and demonstrate how repeated checks reveal asymmetry or over-raising.
# [[English:Craft interview|Craft interview]]: Interview a blacksmith, silversmith or metalwork tutor about raising terminology, preferred hammers, common learner errors and how they decide when to anneal; compare the interview with this module without treating one person's method as universal.
# [[English:Material efficiency audit|Material efficiency audit]]: Trace one sheet-metal job from stock selection to scrap collection, estimate where avoidable waste occurs, and propose two changes that preserve quality and traceability.

{{BR}}
=== Advanced ===
# [[English:Raising method comparison|Raising method comparison]]: Research conventional hand raising, Dutch raising and sinking-assisted raising, then produce a technical comparison that distinguishes metal flow, process control, typical forms and training demands without claiming one method is universally superior.
# [[English:Quality investigation|Quality investigation]]: Measure a supervised raised form at several datums, plot deviation from the drawing, diagnose the likely process causes, and propose a correction sequence that avoids excessive thinning or finishing.
# [[English:Instructional video|Instructional video]]: Working with a tutor, produce a two-minute safety-led demonstration video showing setup checks, one controlled raising course, inspection and a stop condition; do not film unauthorised hot work or powered finishing.
# [[English:Expert review dossier|Expert review dossier]]: Build an expert-review pack containing the job brief, risk controls, material identity, tool list, measured quality evidence, sustainability notes and a reflection on what you would change before making the next form.

{{:Open Task - Create a MOOC}}

{{BR}}
= Learning Assessment =

# [[English:Process reasoning|Process reasoning]]: Given a raised form with a wavy rim, deep hammer-edge marks and one developing split, explain the likely process causes, rank the problems by urgency, and justify the safest correction or stop decision for each.
# [[English:Tool selection assessment|Tool selection assessment]]: From a supplied set of hammers and stakes, select a combination for a specified bowl profile and defend the choice using contact geometry, surface quality and stability rather than naming tools from memory.
# [[English:Material-condition assessment|Material-condition assessment]]: Using tutor-provided samples at different stages of cold work, identify evidence of increasing work hardening and explain why forcing the hardest sample further may increase defect risk.
# [[English:Quality transfer task|Quality transfer task]]: Compare two finished forms that have similar polish but different rim geometry and wall profiles; decide which better meets the drawing and support the decision with measurements.
# [[English:Safety transfer task|Safety transfer task]]: Redesign a cluttered raising station so that tool storage, strike zone, material handling, noise control and emergency communication are improved, and explain which controls act at source rather than relying on PPE.
# [[English:Sustainability transfer task|Sustainability transfer task]]: Propose a production plan for a small batch of hand-raised decorative bowls that reduces sheet waste, finishing time and scrap contamination while preserving craft quality and traceable material selection.

<br>
<br>

{{BR}}
= Evidence of Learning =

Important evidence includes accurate use of practitioner terminology; a clear explanation of raising, sinking, blocking, bouging and planishing; correct identification of hammer and stake functions; a supervised process plan; safe station setup; consistent placement of raising courses; recognition of work hardening and crack risk; measured comparison with a drawing or template; a completed practice form or equivalent observed demonstration record; a quality-inspection sheet; a reflective process log; and a resource-efficiency proposal.

Strong evidence shows that you can transfer knowledge. For example, you can look at an unfamiliar hollow form, infer where support and metal flow were controlled, choose a plausible forming sequence, identify what information is still missing, and explain which operations require separate training. Evidence should also show that you know when to stop and escalate rather than improvising around a hazard.

Assessment evidence must be authentic to your programme. This aiMOOC itself does not confer certification, apprenticeship completion, competence status or professional registration.

<br>
<br>

{{BR}}
= Sources for Expert Review =

'''Great Britain occupational safety, applied in England'''
* [https://www.hse.gov.uk/work-equipment-machinery/puwer-overview.htm HSE: Provision and Use of Work Equipment Regulations overview]
* [https://www.hse.gov.uk/coshh/basics/assessment.htm HSE: how to carry out a COSHH risk assessment]
* [https://www.hse.gov.uk/ppe/overview.htm HSE: using personal protective equipment to control risks at work]
* [https://www.hse.gov.uk/noise/employers.htm HSE: employers' responsibilities for noise at work]
* [https://www.hse.gov.uk/msd/manual-handling/index.htm HSE: manual handling at work]
* [https://www.hse.gov.uk/vibration/hav/responsibilities.htm HSE: hand-arm vibration responsibilities]

'''England vocational training'''
* [https://skillsengland.education.gov.uk/apprenticeships/st0378-v1-1 Skills England: Blacksmith apprenticeship ST0378 version 1.1]

'''United Kingdom standards'''
* [https://www.bsigroup.com/en-GB/about-bsi/national-standards-body/ BSI: the UK's National Standards Body]
* [https://www.gov.uk/guidance/standardisation GOV.UK: standardisation and the role of BSI]

'''UK craft terminology and examples'''
* [https://www.vam.ac.uk/articles/metalworking-techniques Victoria and Albert Museum: metalworking techniques]
* [https://www.goldsmiths-centre.org/whats-on/silversmithing-skills-with-oscar-saurin-sep26/ Goldsmiths' Centre: Silversmithing Skills with Oscar Saurin]
* [https://heritagecrafts.org.uk/craft/silversmithing/ Heritage Crafts: silversmithing]

'''Media verification'''
* [https://commons.wikimedia.org/wiki/File:Silversmithing_anvils_and_hammers.jpg Wikimedia Commons: Silversmithing anvils and hammers.jpg]
* [https://commons.wikimedia.org/wiki/File:Copper_Bowl_with_Lobster_MET_1987.394.178_a.jpg Wikimedia Commons: Copper Bowl with Lobster MET 1987.394.178 a.jpg]
* [https://commons.wikimedia.org/wiki/File:55ConcursoDomingoRamos048.JPG Wikimedia Commons: 55ConcursoDomingoRamos048.JPG]
* [https://commons.wikimedia.org/wiki/File:Blacksmith_anvil_hammer.svg Wikimedia Commons: Blacksmith anvil hammer.svg]
* [https://www.youtube.com/watch?v=IF3hbmX2cdI V&A: How was it made? Pushing silver to its limits]
* [https://www.youtube.com/watch?v=yawQP474RF0 The Art League: How to Raise a Copper Bowl]
* [https://www.youtube.com/watch?v=YAufcYn83Gg Sage Reynolds: Raise a Copper Vessel]

'''Expert-review date:''' 1 September 2026. Official sources and workplace instructions should be rechecked before delivery because legislation, standards, apprenticeship versions and guidance can change.

{{BR}}
= OERs on the Topic =

This aiMOOC is intended for open educational reuse under '''Creative Commons Attribution-ShareAlike 4.0 International''' for the original course text. Third-party images and videos retain the licences and terms stated by their original hosts. When remixing, preserve required attribution and do not assume that an embedded YouTube video is itself openly licensed.

<iframe> https://en.m.wikipedia.org/wiki/Sheet_metal </iframe>

<br>

{{BR}}
= Linked Learning Areas =

{| align=center
{{:D-Tab}}
'''[[English:Raising sheet metal into surfaces and hollow forms|Raising sheet metal into surfaces and hollow forms]]'''
# [[English:Sheet metal|Sheet metal]]
# [[English:Metal forming|Metal forming]]
# [[English:Blacksmithing|Blacksmithing]]
# [[English:Silversmithing|Silversmithing]]
# [[English:Hollowware|Hollowware]]
# [[English:Planishing|Planishing]]
# [[English:Metalworking safety|Metalworking safety]]
# [[English:Quality control|Quality control]]
# [[English:Sustainable manufacturing|Sustainable manufacturing]]
|}

{{BR}}
= aiMOOC Projects =
[[Category:English]]
[[Category:Raising sheet metal into surfaces and hollow forms — Fundamentals]]
[[Category:Vocational education]]
[[Category:Metalworking]]
[[Category:Craft]]
[[Category:Artistic metalwork]]
[[Category:Blacksmithing]]
[[Category:Silversmithing]]
[[Category:Sheet metal]]
[[Category:Metal forming]]
[[Category:Schmiede]]
[[Category:AI_MOOC]]
[[Category:GPT aiMOOC]]
{{MT}}