Odisha CHSE +2 Vocational Modelling and Sculpture cheat sheet

Clay bodies: earthenware matures around 1000–1150°C, stoneware 1200–1300°C; low-fire clay stays porous and suits hand-modelling and terracotta work.

Plaster of Paris sets by exothermic hydration of calcium sulfate hemihydrate; setting time is roughly 20–30 minutes and is shortened by warm water or longer mixing, extended by cold water or a pinch of retarder.

Plaster mixing ratio for moulds is about 1 part plaster to 1.5–1.8 parts water by weight; add plaster to water, not water to plaster, and sprinkle to avoid lumps.

Modelling wax (beeswax plus paraffin or microcrystalline wax) is thermoplastic: it softens with hand heat, melts near 60–70°C, and is worked with heated tools.

Papier-mâché paste is flour-and-water (about 1:3 to 1:4 flour to water, cooked to a slurry) or starch paste; white glue diluted 1:1 with water gives a stronger, less perishable bond.

Release agents: soft soap or petroleum jelly for plaster-to-plaster, thin oil for clay-to-plaster; a missing release layer fuses the cast to the mould.

Armature wire gauge choice: 1.5–2 mm for small figures, 3–5 mm for busts; aluminium wire resists rust, galvanised steel is stiffer.

Terracotta in Odisha uses local alluvial clay; grog (fired clay powder) or sand at 10–20% reduces shrinkage cracking on thick forms.

Clay tools: wooden modelling tools for hollowing and smoothing, wire loop and ribbon tools for removing bulk, wire clay cutter and twisted wire for slicing, sponge and leather-hard scraping tools for finishing.

Carving tools are grouped by profile: gouges (curved, for hollowing), chisels (flat, for planing), V-tools or parting tools (for grooves), and rasps for stone; stone chisels are struck with a wooden or soft mallet, never a steel hammer on a tempered edge.

Plaster tools: plaster rasp, scraper, spatula, rubber bowl (plaster is not washed down drains - it sets and blocks pipes), and dust mask when mixing dry powder.

Stone carving requires eye protection, a dust mask rated for silica, and wet or dust-extraction working; crystalline silica dust causes silicosis.

Casting safety: molten metal and plaster moulds must be bone dry - residual moisture flashes to steam and causes an explosion (steam spalling).

Kiln rules: never open a kiln above roughly 200°C; fire greenware slowly through 100–600°C to drive off water; keep the kiln area clear of solvents and paper.

Hand-tool rules: cut away from the body, clamp the work, keep chisel edges sharp (a dull edge skids), and store edge tools point-down or in a rack.

Ventilation and PPE: resin, thinner and wax vapours need extraction; gloves for epoxy and plaster, goggles for grinding and chiselling, ear protection for power tools.

Gesture drawing captures action in 30 seconds to 2 minutes using the whole arm; contour drawing traces edges slowly without looking at the paper to train observation.

Proportion canon: adult human height is about 7.5 head-lengths; the midpoint of the standing figure falls at the pubic arch; the elbow sits at the waist, the wrist at the crotch.

Sight-measurement uses a pencil held at arm's length: align the tip and thumb to a unit on the subject, then compare other lengths as ratios.

Perspective: one-point has one vanishing point on the horizon, two-point has two on the horizon, three-point adds a vertical vanishing point for looking up or down.

Ellipses: a circle seen at an angle becomes an ellipse; the minor axis points along the receding axis of the cylinder and the ellipse's widest point is not at the edge of the form.

Chiaroscuro uses five tonal zones - highlight, light, core shadow, reflected light, cast shadow - to make a form read as three-dimensional.

Orthographic working drawings give front, side and top views to scale; a maquette is a small 3D sketch made before the full-size sculpture.

Value scales of 5–9 steps are used to plan contrast; a thumbnail sketch (roughly 5 × 8 cm) tests composition before the final drawing.

Elements: line, shape, form, value, colour, texture, space. Principles: balance, rhythm, proportion, emphasis, contrast, movement, unity, variety.

Balance is symmetrical (mirror), asymmetrical (equal visual weight from unequal masses) or radial (around a centre); a heavy dark mass can be offset by a larger light mass further from the axis.

Negative space is the air around and between forms; in sculpture it is designed as deliberately as the solid mass (e.g., the open gaps in a pierced relief).

Rhythm comes from repetition with variation - repeated folds, drapery lines or figure groups create a visual beat; identical repetition without change reads as monotony.

Golden ratio ≈ 1:1.618; the rule of thirds places focal points at the intersections of a 3 × 3 grid.

Focal point/emphasis is created by contrast of value, isolation, convergence of lines, or the only curved form among angular ones.

Texture in sculpture is actual (tactile surface: tool marks, burnishing) or implied (painted or carved illusion); raking light exaggerates actual texture.

Unity is achieved by a dominant idea, consistent scale, repeating angles or a shared colour; variety without unity becomes clutter.

Clay stages: plastic (workable), leather-hard (firm, carve and join), bone dry (no longer cool to the cheek), bisque (once-fired).

Joining clay: score both surfaces, apply slip (clay plus water, cream consistency), press and blend; unmatched moisture levels cause cracks at the joint.

Hollowing: solid clay thicker than about 2–3 cm traps water and explodes in firing; hollow from the base or cut and rejoin when leather-hard.

Coil and pinch methods build form additively; slab work uses rolled clay over a former with a rolling pin and guide sticks for even thickness.

Plaster waste mould: build a clay or board wall, apply release, pour plaster, then chip away the mould; a piece mould has separable sections with registration keys.

Plaster finishing: once set, plaster can be carved, rasped and wet-sanded; a slurry coat or shellac seals the porous surface before painting.

Wax modelling: build up warm wax with heated spatulas, refine when cool, and keep the wax below smoking point; wax is ideal for lost-wax originals.

Papier-mâché layering: 6–10 alternating layers over a form, drying each layer before the next; a separator (oil, cling film) is needed or the shell bonds to the mould.

Carving is subtractive (stone, wood, plaster); modelling is additive (clay, wax); casting is reproductive; assemblage is constructive from found or fabricated parts.

Direct carving works from the block outward with no model, respecting the material's grain or bedding plane; the indirect method copies a plaster model using pointing.

Pointing machine (three-point transfer) scales a model to stone using measured points; callipers transfer widths, a plumb line checks verticals.

Lost-wax casting: wax model → investment (refractory mould) → burn-out → molten bronze poured into the void → mould broken away; the original wax is destroyed.

Sand casting uses a two-part flask with green sand; a pattern is packed, withdrawn, and metal poured into the cavity.

Relief depths: low relief (bas-relief) projects less than half its depth, high relief (alto-relievo) more than half; sunken or incised relief cuts into the surface.

Relief construction uses a graded ground: the highest projection is built up most, and the background plane stays flat; foreshortening is compressed in relief.

Assemblage joins: welding, brazing, bolting, riveting, adhesives; dissimilar metals need isolating washers to prevent galvanic corrosion.

Pattachitra: cloth-based scroll painting from Raghurajpur and Puri; the cloth is treated with tamarind-seed paste and chalk, then painted with natural pigments and outlined in black.

Pattachitra pigments: hingula (red), haritala (yellow orpiment), ramaraja (blue), lampblack, and conch-shell white; brushes are made from mouse hair tied to a bamboo stick.

Palm-leaf etching (talapatra): dried palm leaves are stitched into a bundle, incised with an iron stylus, and filled with lampblack ink; used for manuscripts and Gita Govinda illustrations.

Dhokra/bell metal (lost-wax) casting is practised in Odisha by the Dhokra Kamar artisans; a beeswax thread model is coated in clay, fired, and molten brass poured in.

Terracotta: the votive horses of Bankura-style and Odisha's Bargarh/Dhenkanal potters, plus temple terracotta plaques (e.g., the Sun Temple at Konark and the Vaishnava temples).

Chandua appliqué: temple-hanging canopies from Pipili, made by appliquéing coloured fabric shapes onto a base cloth, often with mirror work.

Jhoti and muruja: floor and wall art using rice paste (jhoti) and coloured powders (muruja) at doorways, especially during festivals such as Manabasa Gurubara.

Tribal traditions: Saura wall painting (ikon) of the Lanjia Saora, and Dokra and wooden carvings of Odisha's tribal belt, use geometric line and ritual iconography.

Portfolio structure: title/statement page, research sketches, maquettes and process photographs, final works, and a short reflection; each sheet carries name, date and medium.

Document the process: photograph the armature, block-in, refinement and finish stages; assessors mark process evidence as much as the finished object.

Photographing sculpture: use a seamless neutral background, two lights at roughly 45° (key and fill), raking light to show texture, and include a scale reference.

A project brief states theme, size, material, technique, time plan and evaluation criteria; the final evaluation compares outcome to intention with specific evidence.

Safe studio routine: label and store materials, clean tools after use, dry greenware slowly, and record kiln firings in a log with date, cone/temperature and results.

Presentation layout: consistent margins, one dominant image per sheet, captions of 20–40 words, and a legible type hierarchy (title larger than body).

Assessment weighting in vocational practicals typically splits marks between process/sketchbook, technical skill, final outcome and viva/presentation.

Mounting: use acid-free board and archival adhesive; avoid tape on the artwork face, and keep 3D maquettes in a rigid box with foam padding.

Clay shrinkage: a typical earthenware body shrinks 6–10% from plastic to fired state; plan armatures and joints to absorb this.

Plaster hardness: dental/stone plaster (hydrocal) is harder and denser than ordinary plaster of Paris and is used for durable casts.

Wax types: paraffin is brittle and cheap, beeswax is soft and sticky, microcrystalline wax is tough and flexible; blends tune working properties.

Papier-mâché armature: cardboard, wire mesh or balloon cores are removed or left inside; a removable core keeps the piece light.

Adhesives: PVA for porous materials, epoxy for metal and stone, cyanoacrylate for quick small joints; surface must be clean and dry.

Metal for armature: aluminium and galvanised steel resist rust; bare mild steel rusts and stains clay and plaster.

Moisture and storage: wrap clay in damp cloth and polythene; plaster must be stored dry, as damp plaster sets into lumps.

Colourants: oxides and stains are mixed into slip or plaster at 1–5% by dry weight; test on a small sample before the full batch.

Bench setup: a turntable or banding wheel for modelling, a carving stand or sandbag for stone, and clamps to hold work during chiselling.

Measuring and marking: callipers for diameters, dividers for transferring lengths, a try square and a plumb bob for verticals.

Sharpening: grind the bevel then hone on a whetstone; a consistent bevel angle (about 25–30° for wood chisels) keeps the edge.

Wood carving: carve with the grain, secure the block, and never place a hand in the path of the blade; a carving glove protects the holding hand.

Dust and fumes: silica dust from stone and plaster, wood dust, resin and solvent vapour all need extraction or a respirator.

Electrical safety: RCD protection on power tools, no trailing cables near water buckets, and check plugs before use.

First aid: plaster burns from exothermic setting, cuts from chisels, and eye injuries from flying chips - keep a first-aid kit and eyewash station stocked.

Housekeeping: sweep clay and plaster debris (slipping hazard), keep aisles clear, and store solvents in a locked metal cabinet.

Line quality: vary pressure and speed to create weight; a single confident line reads better than many hesitant strokes.

Construction drawing: start with a box or cylinder for volume, then add anatomy or features; build from large shapes to small.

Foreshortening: forms pointing toward the viewer are compressed; overlapping edges and size change convey depth.

Cross-contour lines wrap around a form and describe its volume, like lines on a globe.

Shading hatching: parallel, cross-hatch and stippling build value; direction should follow the form's surface.

Colour basics: hue (name), value (lightness), saturation (intensity); complementary pairs create contrast, analogous sets create harmony.

Storyboarding a relief: plan the figure-ground relationship and the highest point of projection before modelling.

Sketchbook practice: date each entry, annotate decisions, and include failed attempts - examiners value evidence of reflection.

Visual weight is affected by size, darkness, complexity, isolation and position; a small dark object can balance a large light one.

Rule of odds: groups of three or five read more naturally than even numbers in composition.

Leading lines and sightlines direct the viewer's eye; in sculpture, the turn of a head or a gesture can act as a leading line.

Scale and proportion: a figure's head, hands and feet are the reference for judging the whole; exaggerating one alters the character.

Contrast types: light/dark, rough/smooth, large/small, straight/curved; one dominant contrast should lead.

Framing and cropping: decide what to exclude; a tight crop increases focus and drama.

Movement: diagonal lines and asymmetrical masses suggest motion; horizontals and verticals suggest rest.

Unity through repetition of a motif, colour or angle ties disparate elements together.

Wedging clay removes air pockets and evens moisture; spiral wedging is used for large batches.

Slip consistency: cream (like pouring cream) for joining; thicker slip for filling cracks.

Leather-hard is the best stage for carving, incising and attaching handles or limbs.

Drying: cover work loosely with polythene to slow drying and prevent cracking; dry thick parts first.

Plaster pouring: pour steadily into the lowest point of the mould to avoid trapping air; tap to release bubbles.

Wax casting prep: sprue and vent the wax model, and invest with a refractory mould before burn-out.

Papier-mâché pulp: soaked paper blended with paste or glue can be pressed into moulds for solid shapes.

Finishing: burnish leather-hard clay with a smooth stone or spoon for a sheen; seal papier-mâché with gesso before painting.

Wood carving: work with the grain, remove bulk with a gouge, refine with a chisel, and finish with a rasp and scraper.

Stone: softer stones (soapstone, sandstone) carve easily; granite needs carbide or diamond tools and power.

Casting steps: pattern or model → mould → wax or pattern removal → pour → de-mould → chase and finish.

Waste mould vs piece mould: a waste mould is broken off (one cast only); a piece mould is reusable and has keys.

Relief composition: keep the ground plane flat, build up the highest projections, and use undercutting sparingly.

Assemblage: dry-fit parts before joining, and consider the centre of gravity and base fixings.

Finishing metal: file, grind, and patinate with chemicals; wax or lacquer seals the surface.

Maquettes: a small-scale model tests proportion, structure and joinery before the final work.

Raghurajpur is the heritage crafts village near Puri known for Pattachitra and palm-leaf etching.

Pattachitra themes: Jagannath, Radha-Krishna, Gita Govinda, and the Dashavatara; figures are shown in profile with large eyes.

Pipili is known for Chandua appliqué canopies and colourful cloth work.

Konark Sun Temple carries extensive stone relief carving; Odisha temples also use terracotta plaque panels.

Dokra casting uses beeswax threads wound into a model, coated with clay, fired, and filled with molten brass.

Manabasa Gurubara: Thursday observance in the month of Margasira, with jhoti floor art and muruja powder designs.

Saura painting uses a red or ochre ground with white line figures and geometric motifs, done on mud walls.

Filigree (tarakasi) work in silver is a Cuttack craft, distinct from casting but part of Odisha's metal tradition.

A written statement of 100–150 words should cover theme, influences, materials and what was learned.

Sketchbook marks come from annotation, not just drawings: label materials, dates and decisions.

Consistency: use one typeface and one caption style across all sheets.

Digital submission: export as PDF at 150–300 dpi, name files clearly, and check the file size limit.

Viva preparation: be ready to explain the choice of material, the sequence of work, and one problem solved.

Health and safety record: note PPE used and hazards controlled in the process log.

Presentation of maquettes: mount on a rigid base with a label giving title, scale and material.

Self-evaluation: compare the final piece with the brief and the maquette, and state specific improvements for next time.