WBBSE Madhyamik Vocational Apparel cheat sheet

The apparel value chain runs fibre → yarn → fabric → garment → retail; each stage adds value, and the garment stage is the most labour-intensive.

India's apparel sector is a major employment generator; the organised segment includes large export houses and the unorganised segment includes small tailoring units and job-work shops.

Career routes in apparel: cutting master, pattern maker, sewing machine operator, quality inspector, sampling assistant, merchandiser, embroidery artisan, and boutique owner.

Export promotion councils and cluster bodies (for example apparel clusters in West Bengal and Tamil Nadu) link trained workers to factories and exporters.

Self-employment path: tailoring shop, alteration service, boutique, uniform supply to schools and hospitals, and small-batch online sales.

Skill progression usually starts at helper/operator level and advances through multi-machine skill, then supervisory roles such as line supervisor or quality checker.

A trade certificate in apparel plus a portfolio of stitched samples is the standard evidence employers ask for at entry level.

Apparel jobs split into pre-production (design, pattern, sampling), production (cutting, sewing, finishing), and post-production (inspection, packing, dispatch).

Fibres are classified as natural (cotton, jute, silk, wool) or man-made (regenerated such as viscose, and synthetic such as polyester and nylon).

Cotton is a cellulose fibre: it absorbs moisture well, is comfortable in heat, but creases and shrinks unless pre-shrunk or finished.

Silk is a protein fibre with high lustre and low moisture regain; wool is protein, scales give felting, and it is damaged by strong alkali and hot water.

Polyester is strong, quick-drying and thermoplastic, so it heat-sets and can be permanently pleated; it has low moisture absorbency.

Staple fibres are short and spun into yarn; filament fibres are continuous. Staple yarns are softer and more absorbent, filament yarns are smoother and stronger.

Yarn count systems: cotton count (Ne) is indirect - higher Ne means finer yarn; denier and tex are direct - higher value means coarser or heavier yarn.

Fabric structure types: woven (warp and weft interlacing), knitted (interlocking loops, stretchy), and non-woven (bonded fibres, no yarn structure).

Basic weaves: plain (strong, firm, used in poplin and calico), twill (diagonal lines, used in denim and gabardine), and satin (float threads give lustre and low friction).

Pattern making methods: drafting from body measurements, flat pattern making by manipulating a basic block, and draping on a dress form.

Key body measurements for a bodice: bust/chest, waist, hip, shoulder width, back length, front length, and sleeve length.

Ease is the difference between body measurement and garment measurement; wearing ease allows movement, design ease creates the style silhouette.

Dart manipulation transfers fullness from one position to another without changing the garment's fit or total dart intake.

The basic block (sloper) has no seam allowance; seam allowance is added afterwards - commonly 1 cm on most seams and 1.5–2 cm on hems.

Grain line must be marked parallel to the centre front or centre back; cutting off-grain causes twisting and poor hang.

Notches on seam lines are balance marks that ensure matching pieces are joined at the correct points during sewing.

Pattern pieces must be labelled with style number, size, piece name, cut quantity, and whether cut on fold or single layer.

Fabric must be laid flat, grain-straight and tension-free before marking; the lay is the stack of fabric plies to be cut together.

Marking tools: tailor's chalk for dark fabrics, tracing wheel and carbon paper for transferring pattern lines to fabric.

Cutting tools: shears for fabric, pinking shears to reduce fraying, a rotary cutter with mat for small lays, and a straight knife for bulk lays.

Seam types: plain seam (most common), French seam (encloses raw edges, used on sheer fabrics), flat-felled seam (strong, used on denim), and overlock-finished seam.

Stitch types: lockstitch (301, straight sewing), chain stitch (401, stretchy, used on hems), overlock (504/514, edge neatening and seaming knits).

Stitch density is measured in stitches per inch (SPI); 10–12 SPI is typical for woven garment seams, higher SPI on fine fabrics.

Construction sequence for a basic shirt: prepare front placket and pocket, attach yoke, join shoulders, set sleeves, join side seams, attach collar and cuffs, then hem.

Pressing is a construction step, not a final step: pressing after each seam opens the seam and prevents bulk in later operations.

The upper thread path runs spool pin → thread guides → tension discs → take-up lever → needle; the bobbin thread forms the lower loop.

Correct threading of both upper and lower paths is checked by sewing a test seam; skipped stitches or thread nests indicate a threading or tension fault.

Tension is balanced when upper and bobbin threads lock inside the fabric; if the bobbin thread shows on top, upper tension is too tight.

Stitch length is set by the feed regulator; longer stitch length is used for basting and topstitching, shorter for fine seams and buttonholes.

Needle size is chosen by fabric weight: fine needles (9–11) for light fabrics, medium (14) for shirting, heavier (16–18) for denim and canvas.

The feed dog moves fabric forward; lowering the feed dog (or using a darning plate) enables free-motion embroidery and buttonholing.

Regular maintenance: remove lint from the bobbin case and feed area, oil according to the manual, and never run the machine with the presser foot down and no fabric.

Safety rules: keep fingers away from the needle path, unplug before changing needles or cleaning, and do not sew over pins.

Measuring tools: tape measure (150 cm, flexible), metre scale, and L-square for right angles in drafting.

Marking tools: tailor's chalk, marking pencil, tracing wheel, and carbon paper; chalk marks must be removed before finishing.

Cutting tools: dressmaker's shears, pinking shears, seam ripper, and rotary cutter; shears must be reserved for fabric only, never paper.

Hand sewing needles are sized by number - higher number means finer needle; thimbles protect the finger during hand stitching.

Pressing equipment: steam iron, ironing board, pressing cloth, sleeve board, and tailor's ham for shaping curved seams.

Measuring and fitting aids: dress form for draping, French curve and set square for armhole and neckline shaping.

Sewing machine accessories: extra bobbins, needles, presser feet (zipper foot, buttonhole foot, hemming foot), and a lint brush.

Care rule: keep tools clean and dry, store needles and pins in a closed cushion, and store shears closed to protect the cutting edge.

Hand embroidery stitches: running stitch, back stitch, stem stitch, chain stitch, satin stitch, blanket stitch, and French knot.

Satin stitch fills a shape with parallel stitches and needs an outline first to keep edges sharp; long satin stitches snag easily.

Chain stitch forms a linked loop line and is worked from the front, keeping the working thread below the needle.

Zari and mirror (abhla bharat) work are traditional decorative techniques; mirror work fixes small mirrors with buttonhole or herringbone stitches.

Appliqué attaches a cut fabric shape to a base fabric and is stitched around the edge; reverse appliqué cuts the top layer to reveal fabric beneath.

Machine embroidery uses a hoop to keep fabric taut; stabiliser prevents puckering and is removed after stitching.

Batik and tie-dye are resist dyeing methods: in tie-dye, tied or bound areas resist dye; in batik, wax is the resist.

Ornamentation must be planned with the garment's care: beads and sequins require hand washing or gentle care and must be attached securely.

Finishing operations include trimming loose threads, removing chalk marks, spot cleaning, pressing, folding, and packing.

Pressing stages: under-pressing during construction, final pressing of the finished garment, and top pressing before packing.

Inspection points: fabric inspection before cutting, in-line inspection during sewing, and final inspection before packing.

AQL (Acceptable Quality Level) sampling inspects a sample from a lot and accepts or rejects the lot against a defined defect limit.

Defect classification: critical (safety or legal, for example needle in garment), major (affects sale or function, for example open seam), minor (cosmetic, for example slight shade variation).

Common sewing defects: skipped stitches, puckering, uneven seam allowance, mismatched stripes or checks, and shade variation between panels.

Measurement check compares the finished garment to the size chart; tolerance limits define how much deviation is acceptable.

Quality is built at the source: correct pattern, correct grain, correct tension, and operator self-check reduce the need for rework.

Machine guarding: needle guard, finger guard, and pulley cover must be in place before operating a sewing machine.

Electrical safety: no frayed cords, no daisy-chained extension boards, earthing for machines, and unplug before maintenance.

Ergonomic risks in apparel work: prolonged sitting, neck and back strain, and repetitive strain of hands; correct chair height and work surface reduce risk.

Physical hazards: needle pricks, cuts from shears and blades, burns from irons and fusing machines, and flying lint.

Chemical hazards: dyes, bleaching agents, and finishing chemicals require gloves, ventilation, and correct labelling.

Fire safety: keep fabric and lint away from irons and heaters, know the location of extinguishers, and keep exits clear.

Waste hierarchy: reduce fabric waste in cutting, reuse offcuts, recycle textile waste, and treat dye effluent before discharge.

First aid basics: treat needle pricks and cuts with clean water and dressing, report injuries, and know the emergency contact numbers.

Cost sheet components: material cost + labour cost + overheads = total cost; selling price = total cost + profit margin.

Material cost = fabric consumption per garment × fabric rate + trims (thread, buttons, zips, labels, packaging).

Fabric consumption is estimated from pattern area plus cutting waste; a common allowance is 5–15% depending on fabric and marker efficiency.

Markup is calculated on cost; margin is calculated on selling price. A 25% markup on cost is not the same as a 25% margin on price.

Break-even quantity = fixed cost ÷ (selling price per unit − variable cost per unit).

Pricing methods: cost-plus pricing, competitive pricing, and value-based pricing; export orders often use FOB (free on board) pricing.

Marketing channels for a small apparel unit: local retail, school and hospital uniform contracts, exhibitions, and online marketplaces.

Record keeping: maintain a bill book, purchase register, wage register, and stock register; these support loan applications and GST compliance.

Workshop sequence: take measurements → draft pattern → cut fabric → construct garment → finish → inspect → record.

A sample book records each stitch or seam type with a labelled fabric swatch, stitch type number, SPI, and machine used.

Portfolio contents: drafted patterns, fabric swatches with fibre identification, stitched samples, finished garment photographs, and a project report.

Project report structure: title, objective, materials and tools, method, cost sheet, photographs, observations, and conclusion.

Measurement record must state the body measurements used, the ease added, and the finished garment measurements for comparison.

Fabric identification in the workshop uses a burn test and feel test; record the observed behaviour rather than guessing the fibre.

Safety check before each workshop session: machine guard in place, needle intact, shears closed, iron switched off when idle.

A finished sample is evaluated on seam straightness, SPI consistency, seam allowance uniformity, pressing quality, and fit to measurement chart.