Red Seal Hairstylist cheat sheet

WHMIS 2015 supplier labels carry six required elements: product identifier, hazard pictograms, signal word, hazard statements, precautionary statements and supplier identity; the Safety Data Sheet has 16 sections and must be accessible to workers.

Disinfectants used on implements must carry a Health Canada Drug Identification Number and be labelled hospital-grade; products labelled only as cleaners or sanitizers do not meet the requirement.

Order of operations is clean then disinfect: wash with soap and water to remove organic debris, rinse and dry, then fully immerse for the label contact time, commonly 10 minutes.

Porous items (wood, foam, buffing blocks, some plastics) cannot be reliably disinfected and must be single-use or discarded; non-porous metal and hard plastic can be cleaned and disinfected for reuse.

Blood or body-fluid exposure: don gloves, wash with soap and water, then disinfect with a hospital-grade product; hepatitis B virus can remain infectious in dried blood for at least seven days.

Electrical safety: receptacles near sinks require ground-fault circuit interrupter protection, cords must stay out of walkways, and damaged tools are removed from service rather than taped.

Ergonomic controls: offset-handle shears with adjustable tension, neutral wrist posture, anti-fatigue matting and scheduled micro-breaks reduce repetitive strain injuries.

Chemical handling: never transfer product into unlabelled containers, keep flammable aerosols away from heat sources, and use local exhaust ventilation for ammonia and solvent vapours.

Personal protective equipment: gloves for chemical and blood contact, closed-toe shoes, hair tied back, and no dangling jewelry or loose sleeves near moving or heated equipment.

Hair analysis covers density, texture (fine, medium, coarse), porosity, elasticity, scalp condition, growth patterns and whorls before any recommendation is made.

Elasticity rule: a wet strand stretching to about 50 percent of its length and returning to normal is healthy; a strand that snaps or stays stretched rules out lightening or relaxing.

Porosity rule: low porosity resists wetting, feels smooth and processes slowly; high porosity absorbs fast, feels rough, takes color quickly and loses it quickly.

Natural level scale runs 1 (black) to 10 (lightest blonde); the record card captures natural level, target level, percentage of gray and underlying pigment.

Patch test oxidative dyes and relaxers 24 to 48 hours before a first application; redness, swelling or itching permanently contraindicates that product for the client.

Contraindications to chemical service: prior allergic reaction to the product, open or infected scalp lesions, recent chemical burn, and hair already breaking or badly damaged.

Gray hair lacks melanin and resists dye; it typically needs extended processing time or a natural/base additive, and 50 percent or more gray usually requires a higher proportion of base.

Consultation sequence: greeting, needs assessment (history, lifestyle, maintenance budget), hair and scalp analysis, recommendation with cost, agreement, then written record.

Color direction is chosen from skin undertone and eye color: warm undertones suit golden, copper and warm brown tones, cool undertones suit ash, violet and cool brown tones.

Elevation determines weight distribution: 0 degrees produces a solid form, 45 degrees graduation, 90 degrees uniform layers, and 180 degrees long layers.

A stationary guide holds every later section at the length of the first and builds a solid line; a traveling guide moves with each section and builds graduation or layering.

Overdirection means combing hair away from its natural fall before cutting; length shifts toward the overdirection and the opposite side is left longer.

Section the head into four, then take subsections no wider than the comb teeth so the hair is controlled and the cutting line stays clean.

Cross-check before finishing by cutting or combing the same section from the opposite direction to confirm balance and expose stepped areas.

Wet hair stretches and dries shorter, so wet cutting yields a shorter finished length; dry cutting reveals the final shape and is preferred for precision on curly hair.

Texturizing techniques (point cutting, notching, slicing, thinning shears) remove bulk without shortening the perimeter; thinning shears remove a percentage of density per cut.

Clipper blades are numbered so lower numbers cut closer to the skin; a fade starts with the closest blade at the perimeter and blends upward to longer blades or shears.

Beard work: outline first with a trimmer, clip with the natural growth direction, and shave with the grain to reduce irritation and ingrown hair.

Developer volumes: 10 volume (3 percent) deposits tone with minimal lift, 20 volume (6 percent) lifts one to two levels, 30 volume (9 percent) lifts two to three, and 40 volume (12 percent) lifts three to four.

Mixing ratio follows the manufacturer; permanent color is commonly 1:1, some lines use 1:2, and high-lift blondes are usually mixed 1:2.

Underlying pigment by level: 1 to 3 red, 4 to 5 red-orange, 6 orange, 7 orange-yellow, 8 yellow, 9 to 10 pale yellow.

Neutralization rule: blue cancels orange, violet cancels yellow, and green cancels red; use the opposite on the color wheel to correct unwanted warmth.

Lightening stages progress red, red-orange, orange, yellow-orange, yellow, pale yellow; stopping before pale yellow leaves unwanted warmth in the final result.

Perm chemistry: ammonium thioglycolate near pH 9 to 9.6 breaks disulfide bonds so hair can be reshaped on a rod; the neutralizer (hydrogen peroxide or sodium bromate) re-forms the bonds.

Relaxer chemistry: sodium hydroxide (lye, pH about 12 to 14) or guanidine and calcium hydroxide (no-lye); avoid shampooing 48 to 72 hours before, base the scalp, and neutralize until the lather stays clear.

Never overlap a relaxer and an oxidative color in the same service; allow roughly two weeks between the two chemical processes and strand test first.

Record the formula completely: product line, level and tone, developer volume, mixing ratio, processing time, and the observed result.

Hair layers: cuticle (overlapping protective scales), cortex (bulk of the fibre, holds melanin and disulfide bonds), and medulla, which may be absent in fine hair.

Hair and scalp sit near pH 4.5 to 5.5; alkaline products swell and lift the cuticle, while acidic products contract and smooth it.

Growth cycle: anagen is the two to six year growth phase at roughly 1 cm per month, catagen lasts a few weeks, and telogen rests about three months before shedding.

Scalp types are normal, dry and oily; dandruff (pityriasis) shows loose white flakes, while seborrheic dermatitis shows redness and greasy yellow scales and may need medical referral.

Shampoo selection: clarifying for buildup, moisturizing for dry or chemically treated hair, and medicated actives (zinc pyrithione, ketoconazole, selenium sulfide, coal tar) for dandruff.

Conditioners use cationic surfactants that bond to negatively charged hair, smoothing the cuticle, reducing static and improving wet combability; oily scalps need conditioner on ends only.

Refer to a physician rather than servicing: ringworm, impetigo, lice, scabies, pus, spreading redness or open sores on the scalp.

Scalp massage increases circulation and softens sebum, but is avoided over open lesions, recent chemical burns or acutely inflamed dermatitis.

Blow-drying rule: point the nozzle down the shaft from root to end under brush tension, then finish with cool air to set the cuticle flat for shine and reduced frizz.

Thermal temperature rule: about 150 to 180 degrees Celsius for fine, lightened or damaged hair and 180 to 230 degrees Celsius for coarse resistant hair, always with a heat protectant and limited passes.

Curling iron barrel size sets the curl: a smaller barrel gives a tighter curl, and each section is held about 8 to 10 seconds then cooled before brushing out.

Wet setting: base, stem and curl placement control volume and direction, and the hair must be fully dry before rollers or pins are removed.

Wig cap constructions: monofilament (hand-tied, natural multi-directional part), lace front (natural hairline), and capless or wefted (lighter and less expensive); measure circumference, front-to-nape and ear-to-ear.

Hair addition methods include clip-in, tape-in, keratin or fusion strand-by-strand, micro-link and weft or sew-in; each has its own re-tightening interval and cleansing restrictions.

Traction alopecia prevention: tight braids, weaves and ponytails pull on follicles and can cause permanent loss, so keep tension low, limit wear time and rotate anchor points.

Braiding tension: keep an even, moderate pull and avoid gripping the hairline, and never braid over broken skin or a tender scalp.

Tool safety: unplug thermal tools when not in use, keep cords clear of the client chair, and never use aerosol or flammable product near hot tools.