UPMSP Intermediate Sewing cheat sheet

Machine needle sizing uses two numbers: the metric size (needle blade diameter in hundredths of a millimetre) and the Singer/imperial size; a 80/12 needle suits medium cotton, 100/16 suits denim, 60/8 suits chiffon.

Needle point types: sharp (woven), ballpoint (knits, pushes between loops instead of cutting them), universal (slight ballpoint, general use), and leather point (wedge, cuts leather).

Upper thread tension is set by the tension discs; bobbin tension is set by the small screw on the bobbin case and should rarely be changed. Loops underneath mean upper tension too loose.

Stitch length is measured in millimetres per stitch; 2.5 mm is standard for seams, 3–4 mm for basting, 1.5–2 mm for topstitching and fine fabrics.

A seam ripper, tailor's chalk, measuring tape, pinking shears, seam gauge, and tracing wheel are non-negotiable basic tools; fabric shears must never cut paper because paper dulls the blades.

Machine timing: the needle must pick up the bobbin thread at the lowest point of its stroke; skipped stitches usually indicate a bent needle, wrong needle type, or incorrect needle-to-hook timing.

A serger (overlocker) trims the seam allowance, stitches with 3–4 threads, and can stretch with knits; it cannot replace a straight-stitch machine for seaming because it has no backstitch.

Presser foot pressure and feed dog height are adjustable on industrial machines; lowering foot pressure prevents puckering on fine fabrics.

Woven fabrics have warp (lengthwise, stronger, less stretch) and weft (crosswise) yarns; the bias runs at 45° to both and has the greatest stretch and drape.

Selvedge is the finished lengthwise edge; the grainline arrow on a pattern must be placed parallel to the selvedge.

Natural fibres: cotton (absorbent, wrinkles, shrinks), linen (strong, creases, cool), wool (warm, resilient, felts), silk (lustrous, delicate). Regenerated: viscose/rayon. Synthetic: polyester, nylon, acrylic.

Shrinkage: pre-wash and pre-shrink cotton and linen before cutting; wool can be shrunk by steam pressing.

Fabric preparation: straighten the grain by tearing or pulling a weft thread, then press out creases before laying out the pattern.

Nap and one-way designs (corduroy, velvet, printed directional fabric) require all pattern pieces to be cut in the same direction; buy extra fabric for matching.

Fabric width is usually 90 cm (36") or 112–150 cm (44–60"); yardage requirements depend on width, size, and layout.

Fibre identification: burn test - cotton smells of burning paper and leaves soft ash; wool smells of burning hair and leaves a crushable bead; synthetics melt and form a hard bead.

Key measurements: bust/chest, waist, hip, back length (nape to waist), shoulder width, sleeve length, and inseam; take measurements over light clothing with the tape snug, not tight.

Bust/chest is measured at the fullest point; waist at the natural waistline (the narrowest point); hip at the fullest point, usually 18–23 cm below the waist.

Ease = the difference between body measurement and garment measurement. Wearing ease allows movement (about 5–10 cm at bust); design ease is added for style.

Pattern symbols: grainline arrow, notches (single/double), darts, fold line, place-on-fold, buttonhole marks, and seam allowance lines.

Standard seam allowance is 1.5 cm (5/8") for most seams, 1 cm for necklines, and 4–5 cm for hems.

Dart manipulation moves fullness from one location to another without changing the fit; slash-and-spread adds fullness for gathers or pleats.

Grading increases or decreases a pattern by a fixed amount per size (usually 1–2 cm at bust/hip) while keeping the design lines proportional.

A toile (muslin) is a test garment made in inexpensive fabric to check fit before cutting the final fabric.

Lay out pattern pieces on the straight grain, pin parallel to the edges, and cut with long, smooth strokes using only the tips of the shears on the table.

Mark all notches, darts, and fold lines with tailor's chalk or tracing paper before removing the pattern.

Seam types: plain (right sides together, stitch, press open), French (encloses raw edges, for sheer/light fabrics), flat-felled (strong, for jeans), and overlocked.

Darts are stitched from the wide end to the point, tied off (not backstitched) at the point to avoid a pucker; press darts toward the centre or downward.

Gathering: sew two rows of long machine stitches, pull the bobbin threads to distribute fullness evenly.

Easing distributes slight fullness without visible gathers, often used at sleeve caps and princess seams.

Clipping is cutting into a seam allowance on a curve (concave) to let it spread; notching removes wedges on a convex curve to let it lie flat.

Stay-stitching is a line of straight stitching 1 cm inside the seam line on curved edges to prevent stretching before construction.

Backstitch 1–2 cm at the start and end of every seam; use a lockstitch or tie off at dart points and corners.

Press as you sew: press each seam flat, then open, using an iron with the correct heat for the fibre; press, do not iron (lift and lower the iron).

Fit adjustments: a horizontal fold across a pattern shortens it; a slash-and-spread lengthens it; a vertical fold narrows it.

Common fitting problems: diagonal drag lines indicate a bust or hip adjustment; horizontal wrinkles across the back indicate a short back length or tight bust.

Hems: turn up 2.5–4 cm for skirts/trousers; blind hem for formal wear, double-fold for casual, rolled hem for sheer fabrics.

Closures: buttonholes are cut on the lengthwise grain; zippers are inserted centred, lapped, or invisible; hook-and-eye closures are used at waistbands and necklines.

Finishing touches: trim loose threads, overcast raw edges, remove basting stitches, and give the garment a final press on the wrong side.

Seam finishes: overlock, zigzag, French seam, flat-fell, or Hong Kong (bound) finish for unlined garments.

Care label symbols: washtub (wash), triangle (bleach), square with circle (tumble dry), iron (ironing), circle (dry clean); dots and bars indicate temperature and cycle.

Wash temperatures: cold (up to 30°C) for delicates and dark colours; warm (40°C) for general cottons; hot (60°C+) for whites and towels.

Stain rule: blot, never rub; remove stains while fresh; test any remover on a hidden seam allowance first.

Protein stains (blood, egg, milk) are removed with cold water and enzyme detergent, never hot water, which sets the stain.

Grease stains are removed with absorbent powder (cornflour/talc), then dish soap or dry-cleaning solvent.

Ink and rust stains need solvent-based or acidic removers (lemon juice and salt for rust); bleach only on bleach-safe fibres.

Iron temperatures: cotton high, wool medium with a damp cloth, silk low, synthetics low; never iron over zippers or buttons directly.

Store garments on padded hangers for knits and silks; fold knits flat to avoid shoulder stretch; cedar or lavender deters moths.

Production flow: design → pattern making → sample/toile → grading → marker making → cutting → sewing (line production) → finishing → quality inspection → packing → dispatch.

A marker is the layout of pattern pieces on fabric to minimise waste; marker efficiency = (area of pattern pieces ÷ area of fabric used) × 100.

SAM (Standard Allowed Minute) measures the time to complete one operation including allowances; it is used for costing and line balancing.

Costing components: fabric, trims, labour, overheads, and profit margin; fabric is usually the largest cost in a garment.

Quality control checks: stitch density (stitches per cm), seam strength, colour fastness, measurement tolerance, and symmetry.

Sampling stages: proto sample, fit sample, size set, salesman sample, and pre-production sample.

Fabric wastage sources include end-of-roll loss, defects, and pattern matching; defects are marked and cut around.

Export documentation commonly includes the commercial invoice, packing list, and certificate of origin.

Machine safety: keep fingers at least 2 cm from the needle path, use a finger guard, unplug before changing needles or cleaning, and never leave a running machine unattended.

Electrical safety: check cords for fraying, keep cables away from water, and use an RCD/earth-leakage breaker.

Ergonomics: chair height so feet rest flat, table at elbow height, good lighting, and a 5–10 minute break every hour to prevent strain.

Iron safety: keep the iron on its heel, never leave it face down, and use a heat-resistant mat.

Small-business basics: calculate unit cost = materials + labour + overhead; set price with a markup that covers profit; keep records of every sale.

Marketing channels for a sewing business include local tailoring, school uniforms, alterations, online marketplaces, and social media.

Register the business, obtain a GST/tax number where applicable, and keep a simple cash book to track income and expenses.

First-aid kit for the sewing room: adhesive plasters, antiseptic, tweezers, and a burn gel for iron injuries.

Project sequence: take measurements → select fabric → make/adjust pattern → cut → stitch → fit → finish → press.

A simple A-line skirt requires about 1.5–2 m of 112 cm fabric; a basic kurta needs 2.5–3 m; a pair of trousers needs 2–2.5 m.

Sample stitches to practise: straight stitch, zigzag, buttonhole, blind hem, and overlock; test each on a scrap of the actual fabric first.

Seam allowance consistency is the single biggest factor in whether pieces fit together; measure it with a seam gauge.

Buttonholes: mark the length as button diameter + thickness + 0.3 cm; stitch a test buttonhole on a scrap first.

Zipper insertion: pin, baste, stitch with a zipper foot, then remove basting; press on the wrong side with a pressing cloth.

Quality check before finishing: seams even, darts pressed, hem level, no puckers, no loose threads, and buttons secure.

Portfolio practice: keep samples of each seam and finish in a notebook with the fabric name and settings used.

Sewing machine threading order: spool pin → thread guide → tension discs → take-up lever → needle bar guide → needle eye; always thread with the presser foot up.

Bobbin winding must be even; an uneven bobbin causes tension problems and skipped stitches.

Stitch density on knits: use a narrow zigzag or stretch stitch; a straight stitch will pop when the fabric stretches.

Fabric-to-needle matching table: chiffon 60/8 sharp, cotton 80/12 universal, denim 100/16 sharp, knits 75/11 ballpoint, leather 110/18 leather point.

Test seams on scraps before every project: check tension, stitch length, and needle suitability on the actual fabric.

Hand stitches: running stitch (basting), backstitch (strong seam), slip stitch (invisible hem), whip stitch (raw edge), and blanket stitch (decorative edge).

Thread choice: cotton thread for cotton and linen, polyester thread for synthetics and knits, silk thread for fine silk; match thread weight to fabric weight.

A pressing cloth protects delicate fabrics and prevents shine on wool and synthetics.

A bent or blunt needle causes skipped stitches, thread breakage, and fabric pulls; replace the needle after every 8–10 hours of sewing.

The bobbin case tension screw should be adjusted in quarter turns; a full turn will jam the machine.

A walking foot feeds thick or slippery layers evenly and is used for quilting, vinyl, and multiple layers.

A seam gauge measures hem depth and seam allowance; a French curve shapes armholes and necklines; a hip curve shapes side seams.

Sewing machine servicing: remove lint from the bobbin area after each project, oil according to the manual, and have the machine serviced annually.

A blind hemmer and a buttonholer are specialised machines; a straight-stitch machine with a buttonhole foot can make a 4-step buttonhole.

Scissors vs shears: shears have a bent handle for cutting on the table, scissors have straight handles for cutting in the air.

Thread tension test: stitch on a scrap; if the top thread lies flat and the bobbin thread is pulled up, increase bobbin tension or decrease upper tension.

Fabric weight is measured in GSM (grams per square metre): light 50–150 GSM, medium 150–300 GSM, heavy 300+ GSM.

Thread count is the number of warp and weft threads per square inch; higher count generally means a smoother, finer fabric.

Colour fastness is the fabric's resistance to fading; test by rubbing a damp white cloth on a hidden area.

Fabric defects include slubs (thick yarn), holes, mispicks, and shade bars; mark defects on the wrong side before cutting around them.

Natural fibres are breathable and biodegradable; synthetics are strong, quick-drying, and resistant to creasing but less breathable.

Fabric grain: lengthwise grain has little stretch, crosswise grain has slight stretch, bias has maximum stretch.

Pre-treatment: wash cotton and linen in hot water to shrink; steam wool; do not pre-wash dry-clean-only fabrics.

Fabric storage: roll or fold loosely, keep away from sunlight, and store with cedar or silica gel to prevent damage.

Measurement chart: bust, waist, hip, shoulder, back length, sleeve length, and inseam are the minimum set for a bodice and skirt block.

A basic block (sloper) is a fitted pattern with no design ease; all other patterns are derived from it by adding ease and design lines.

Pattern grading rules: increase 1 cm at bust, 1 cm at waist, and 1.5 cm at hip per size; keep the grainline and notches proportional.

Dart intake is calculated as (bust measurement + ease − waist measurement) ÷ number of darts; a fitted bodice usually has two waist darts.

The armscye depth is measured from the shoulder point down to the underarm; it determines the armhole curve.

Pattern paper layout: place the largest pieces first, use the fold line for centre-front and centre-back, and leave 1 cm between pieces.

Seam allowance is added after the pattern is drafted; the stitching line is the true pattern line.

A muslin/toile fit check reveals drag lines, gaping necklines, and tight armholes before the final fabric is cut.

Cutting tools: fabric shears for fabric only, pinking shears for finishing raw edges, rotary cutter and mat for accurate straight cuts.

Pin placement: place pins perpendicular to the seam line so the machine needle can pass over them, or remove pins before the needle reaches them.

Seam allowance pressing: press the seam flat first to set the stitches, then press open; this prevents puckering.

French seam: stitch wrong sides together at 1 cm, trim to 0.5 cm, turn, stitch right sides together at 1 cm; the raw edge is enclosed.

Flat-fell seam: stitch wrong sides together, trim one allowance to 0.5 cm, fold the wider allowance over it, and topstitch.

Gathers vs pleats: gathers are soft folds made by pulling threads; pleats are pressed folds of fixed width.

Stay-stitching prevents stretching on necklines, armholes, and waistlines before the garment is assembled.

Clipping and notching are done after stitching and before pressing to allow curved seams to lie flat.

Seam types by fabric: French for sheer/light, flat-fell for heavy/denim, overlock for knits, plain for general wovens.

Hem depth: 2.5 cm for skirts, 4 cm for trousers, 1 cm for sleeves, and 0.5 cm for rolled hems on sheer fabric.

Buttonhole spacing: mark the first buttonhole at the neckline and the last at the waistline; space the rest evenly.

Zipper types: centred (general), lapped (trousers/skirts), invisible (dresses), and exposed (decorative).

Fitting order: check the bust, then the waist, then the hip, then the length; adjust the largest problem first.

Final press: press the garment on the wrong side with a pressing cloth; use a ham for curved seams and a sleeve board for sleeves.

Quality inspection: check seam strength, even hem, secure buttons, clean buttonholes, and no loose threads.

Finishing a project: label the garment, fold neatly, and store with a care label attached.

Care label symbols: washtub with a number = maximum wash temperature; triangle = bleach; square with circle = tumble dry; iron with dots = temperature; circle = dry clean.

Wool should be hand-washed in cool water with a wool detergent and dried flat; never wring or tumble dry.

Silk should be hand-washed or dry-cleaned; use a mild detergent and avoid direct sunlight when drying.

Stain removal order: blot, flush with cold water, apply remover, wait, rinse, and repeat; never rub the stain in.

Enzyme detergents break down protein and starch stains; oxygen bleach is colour-safe; chlorine bleach damages wool and silk.

Moth prevention: store clean garments (moths are attracted to body oils), use cedar or lavender, and check stored wool regularly.

Ironing temperatures: cotton 200°C, linen 230°C, wool 150°C with steam, silk 120°C, polyester 110°C.

Dry cleaning uses solvent rather than water; it is suitable for wool, silk, and structured garments that would lose shape in water.

Marker efficiency is improved by nesting small pieces into gaps, using the fabric width fully, and choosing the correct layout (single or double).

SAM (Standard Allowed Minute) = basic time × (1 + allowance %); it is used for line balancing and wage calculation.

Line balancing assigns operations to workstations so that each station's time is close to the takt time.

Quality control uses AQL (Acceptable Quality Level) sampling; a lot is accepted or rejected based on the number of defects found in a sample.

Costing formula: total cost = fabric + trims + labour + overhead; selling price = total cost ÷ (1 − profit margin %).

Sampling stages: proto, fit, size set, salesman, and pre-production samples; each must be approved before bulk production.

Fabric consumption is calculated from the marker length × number of garments per marker; add 3–5% for wastage.

Export documents: commercial invoice, packing list, certificate of origin, and bill of lading.

Machine safety rules: tie back long hair, remove loose jewellery, wear closed shoes, and keep the work area clear of clutter.

Needle safety: never leave a broken needle in the fabric; dispose of it in a sharps container, not the bin.

Electrical safety: unplug the machine before cleaning, oiling, or changing the needle; check the cord for damage.

Iron safety: use a stand, never rest the iron on the fabric, and keep the cord away from the iron plate.

Business startup costs: machine, table, scissors, thread, fabric, rent, and electricity; calculate the break-even point before starting.

Pricing a garment: add the cost of materials, labour at an hourly rate, overhead, and profit margin; compare with local market rates.

Record keeping: a cash book, invoice book, and stock register are the minimum for a small tailoring business.

Customer service: take measurements in writing, confirm delivery dates, and keep a copy of the order for both parties.

Project planning: choose a simple project first (tote bag, pillow cover, A-line skirt) and increase complexity as skills grow.

Fabric requirement for a tote bag: 0.5 m of 112 cm fabric; for a pillow cover: 0.6 m; for an A-line skirt: 1.5–2 m.

Sample practice: sew straight lines on paper without thread to practise speed control and seam straightness.

Seam allowance consistency is checked with a seam gauge; a 1.5 cm allowance is standard for most projects.

Buttonhole practice: stitch on a double layer of the actual fabric, cut open with a seam ripper, and test the button fit.

Zipper practice: baste the zipper in place, stitch with a zipper foot, and remove the basting; press with a pressing cloth.

Final quality check: seams even, darts pressed, hem level, no puckers, no loose threads, and buttons secure.

Portfolio: keep a notebook of fabric samples, seam samples, and settings used for each project.

Machine threading order: spool pin → thread guide → tension discs → take-up lever → needle bar guide → needle eye; thread with the presser foot up.

Bobbin winding must be even; an uneven bobbin causes tension problems and skipped stitches.

Stitch density on knits: use a narrow zigzag or stretch stitch; a straight stitch will pop when the fabric stretches.

Needle-to-fabric table: chiffon 60/8 sharp, cotton 80/12 universal, denim 100/16 sharp, knits 75/11 ballpoint, leather 110/18 leather point.

Test seams on scraps before every project: check tension, stitch length, and needle suitability on the actual fabric.

Hand stitches: running stitch (basting), backstitch (strong seam), slip stitch (invisible hem), whip stitch (raw edge), and blanket stitch (decorative edge).

Thread choice: cotton thread for cotton and linen, polyester thread for synthetics and knits, silk thread for fine silk; match thread weight to fabric weight.

A pressing cloth protects delicate fabrics and prevents shine on wool and synthetics.