DE Nail Technician cheat sheet

Nail plate layers: dorsal (thin, protective), intermediate (thickest, main body), ventral (thin, next to bed); the nail plate rests on the nail bed, which extends from the matrix to the hyponychium.

Nail growth rates: fingernails average about 3 mm per month (0.1 mm/day); toenails average about 1 mm per month; full fingernail replacement takes roughly 4-6 months, toenail 9-12 months.

Matrix is the tissue at the proximal nail fold that produces most of the nail plate; damage to the matrix can cause permanent grooves or ridges. The lunula is the visible portion of the matrix.

Cuticle (eponychium) seals the proximal nail fold against infection; the hyponychium seals the free edge; the lateral nail folds are the sidewalls. Never cut living tissue; treat cuticle as a seal.

Eponychium and cuticle are not the same: eponychium is the living skin at the proximal fold; cuticle is the dead, thin layer of skin over the nail plate. Only the true cuticle may be softened and gently pushed.

Nail plate is approximately 80-90% keratin; water content affects flexibility; healthy nail plate has a pH of about 4.5-5.5, and nail hardeners work by cross-linking or by reducing moisture loss.

Nail growth is affected by age, season, pregnancy, nutrition, and circulation; growth slows in winter, in older adults, and with poor circulation; systemic disease can alter growth rate and shape.

Contraindications for service: paronychia, onychomycosis, open cuts, severe inflammation, or undiagnosed discoloration (especially a new dark streak) require referral to a physician, not a nail service.

Disinfection vs. sterilization: disinfection kills most pathogens on surfaces; sterilization destroys all microbial life including spores and is required for items that contact broken skin. Implements must be cleaned, then disinfected, then stored covered.

Nail shapes: square (strongest, free edge straight), squoval (square with rounded corners), round (follows fingertip), oval (longer, tapered), almond (narrow, tapered), stiletto (very pointed). Shape choice depends on natural nail length, lifestyle, and strength needs.

Filing rule: file in one direction, from corner to center, using a gentle motion; use a 180-grit or finer for natural nails; avoid back-and-forth sawing that causes splitting and peeling.

Product chemistry: acrylic (liquid monomer + powder polymer, cures by polymerization); gel (cures under UV/LED by photoinitiator activation); wraps (fabric plus resin); each requires compatible products and correct cure.

Liquid-to-powder ratio for acrylic: a wet bead should be about the size of a small pea for a nail; too wet causes shrinkage and lifting, too dry causes brittleness; correct ratio produces a smooth, creamy bead.

Gel curing: UV lamps cure at about 365-395 nm; LED lamps at about 395-405 nm; cure times depend on lamp and product; under-curing causes lifting, discoloration, and allergic reaction risk.

Sanitation in service: wash hands before and after, use single-use files and buffers or disinfect them, discard porous items that cannot be disinfected, and keep all containers closed when not in use.

Nail prep sequence: remove old product, shape and file, buff the surface lightly, remove dust, dehydrate with cleanser, apply primer or base, then product; oil or moisture on the plate causes lifting.

Removal: acetone dissolves acrylic and gel; never pry or force product off; for gel, file the top layer and soak in acetone; for acrylic, file down and soak; forcing removal damages the nail plate.

Client assessment: check for contraindications (infection, inflammation, injury, allergies), ask about medications, diabetes, and prior allergic reactions; document findings and refer when needed.

Allergic contact dermatitis from acrylates is a real risk; symptoms include itching, redness, and swelling at the nail folds; repeated exposure increases sensitization; stop service and refer to a physician.

Nail diseases vs. disorders: onychomycosis (fungal infection) is contagious and requires medical treatment; onycholysis (separation of plate from bed) is a disorder; paronychia is inflammation/infection of the nail fold.

Discoloration flags: a new dark streak under the nail, sudden darkening, or a lesion around the nail requires medical referral; do not cover undiagnosed discoloration with product.

Safety data sheets (SDS) provide hazard information for each product; keep them accessible; follow manufacturer instructions for mixing, storage, and ventilation.

Ventilation and PPE: use local exhaust or adequate ventilation, wear gloves and a mask when dust is generated, and never eat or drink at the work station.

Tool care: clean implements with soap and water before disinfection; use an EPA-registered hospital-grade disinfectant; follow contact time on the label; store disinfected tools in a covered container.

Client record keeping: note products used, service date, and any reactions; this supports safe future services and traceability.

Nail anatomy terms: onych/o (nail), onychomycosis (fungal infection), paronychia (inflammation of the nail fold), onycholysis (separation), onychocryptosis (ingrown nail), leukonychia (white spots), melanonychia (dark streak).

Skin conditions: dermatitis (inflammation), erythema (redness), edema (swelling), pruritus (itching), vesicles (small blisters); these are contraindications for product application until resolved.

Infection control terms: pathogenic (disease-causing), nonpathogenic (harmless), bactericidal (kills bacteria), virucidal (kills viruses), fungicidal (kills fungi), sporicidal (kills spores).

Sterilization methods: autoclave (steam under pressure, about 121-134°C), dry heat, and chemical sterilants; disinfection does not equal sterilization.

The nail plate is nonporous; it absorbs very little water compared with skin; this is why product adhesion depends on surface preparation and dehydration rather than absorption.

Nail growth and health reflect systemic conditions: thyroid disease, anemia, and psoriasis can alter nail appearance; nail technicians do not diagnose but should refer suspicious findings.

Ergonomics: keep wrists neutral, adjust chair and table height, and take breaks; repetitive strain and poor posture are common occupational hazards.

Legal and ethical scope: nail technicians provide cosmetic services only; diagnosing or treating disease is outside scope; refer clients with suspected conditions to a physician.

Product compatibility: never mix brands of acrylic liquid and powder or gel base and top coat; incompatible chemistry causes lifting, yellowing, or failed cure.

Acetone is flammable; store away from heat and open flame; use in a ventilated area; keep away from eyes and broken skin.

Methacrylate vs. cyanoacrylate: cyanoacrylate (nail glue) cures rapidly with moisture; methacrylate monomers cure by polymerization; both can sensitize skin with repeated exposure.

Nail tips and forms: tips are pre-shaped and bonded to the free edge; forms are reusable or disposable and support the product during building; forms give more control for sculpting.

Nail art safety: use only cosmetic-grade pigments and glitters; avoid products not intended for nails; keep small items away from children and store securely.

Electric file (e-file) safety: use low speed for natural nails, keep the bit moving, avoid heat buildup, and use proper bits for the task; improper use can cause burns and nail damage.

UV/LED lamp maintenance: replace bulbs or lamps per manufacturer schedule; clean the lamp interior; test cure on a spare tip; old lamps under-cure and cause service failure.

Business and licensing: follow state board rules for licensing, sanitation inspections, and continuing education; keep licenses posted as required by the jurisdiction.

Client consultation: ask about lifestyle, occupation, and expectations; match product type (acrylic, gel, wrap) to nail condition and maintenance tolerance; document the plan.

Nail plate preparation: push back cuticle gently, remove nonliving tissue, buff lightly, and dehydrate; do not over-file the plate, which thins it and increases sensitivity.

Product application: keep product off the skin to prevent lifting and allergic reaction; maintain a small margin at the cuticle and sidewalls; cure or set per manufacturer instructions.

Finishing: shape and refine the surface, seal the free edge, and apply top coat; check for balance and smoothness; file the free edge thin enough to avoid lifting.

Aftercare advice: keep nails dry for the first hours after service, use cuticle oil, avoid using nails as tools, and schedule maintenance every 2-3 weeks for acrylics and gels.

Removal and rebalancing: rebalance fills every 2-3 weeks; remove product fully before a new set; never apply new product over lifted or infected areas.

Sanitation between clients: change towels and linens, disinfect the table and tools, wash hands, and use fresh files or disinfected implements for each client.

Record keeping and follow-up: note service details, products, and any client concerns; follow up on reactions and refer to a physician if symptoms persist.

Nail disorders: Beau's lines (horizontal grooves from interrupted growth), koilonychia (spoon nails), pitting (psoriasis), clubbing (enlarged fingertips), and onychorrhexis (brittle, split nails) are signs to document and refer.

Fungal infection signs: thickening, yellow-brown discoloration, crumbling, and separation; do not treat with nail products; refer to a physician; disinfect tools after any contact.

Bacterial infection signs: redness, swelling, pain, pus, and warmth around the nail fold (paronychia); stop service and refer; do not apply product over infected tissue.

Nail psoriasis and eczema can cause pitting and separation; products may irritate; patch test and use gentle products; refer for medical management.

Ingrown nail (onychocryptosis): pain and redness at the sidewall; do not cut into the sidewall; refer to a podiatrist or physician; proper filing technique helps prevent recurrence.

Brittle nail syndrome: splitting and peeling; causes include harsh removers, over-filing, and dryness; recommend moisturizing and gentler removal methods.

Client education: explain that nails grow slowly, that product does not strengthen the natural nail permanently, and that maintenance is required to avoid damage.

Emergency response: for allergic reaction, remove product, wash the area, and advise medical care; for cuts, stop service, clean and cover the wound, and disinfect tools.

State board rules vary: licensing requirements, sanitation standards, and scope of practice differ by jurisdiction; verify current rules before offering services.

Informed consent: explain risks (allergic reaction, lifting, nail damage) and alternatives; document the client's agreement.

Confidentiality: keep client records private; share only with the client or as required by law.

Advertising and claims: do not claim medical benefits or cures; describe services as cosmetic; avoid misleading claims about nail health.

Insurance and liability: professional liability insurance covers claims of injury or damage; maintain coverage and follow safety protocols to reduce risk.

Continuing education: many jurisdictions require hours for license renewal; keep certificates and track deadlines.

Workplace safety: follow OSHA-style hazard communication for chemicals; keep SDS accessible and train staff on safe handling.

Professional boundaries: do not diagnose or treat disease; refer clients to appropriate medical professionals when findings are suspicious.

Nail plate thickness is about 0.5 mm at the free edge and thicker at the base; the plate is formed by compacted keratinocytes; the cuticle is a thin, nonliving layer.

The hyponychium is the seal under the free edge; the onychodermal band is the narrow band of tissue at the free edge that helps seal the nail bed.

Nail matrix produces the plate; the lunula is the visible matrix; the proximal nail fold protects the matrix; the lateral folds guide growth.

Nail growth is fastest on the middle finger and slowest on the thumb and little finger; toenails grow slower than fingernails.

Nail plate water content is about 10-30%; too much water causes softness and lifting; too little causes brittleness; balance is key for adhesion.

Nail pH is acidic (about 4.5-5.5); alkaline products can damage the plate; use pH-balanced products and avoid harsh soaps.

Nail plate is permeable to some substances; this is why product ingredients can penetrate and cause sensitization; keep product off skin and follow safety guidelines.

Nail cosmetics regulation: products are regulated as cosmetics in many jurisdictions; follow labeling, ingredient, and safety requirements; keep records of product batches.

Service setup: clean table, fresh towels, disinfected tools, and single-use items; arrange products so containers stay closed; keep a waste container for used items.

Client positioning: sit at a comfortable height, support the client's hand, and keep wrists neutral; adjust lighting for visibility.

Nail preparation steps: remove old product, sanitize hands, shape nails, push cuticles, buff, remove dust, dehydrate, and apply product.

Product application steps: apply base or primer, build the product in thin layers, cure or set, refine the shape, and seal with top coat.

Finishing and cleanup: check edges, apply cuticle oil, clean the table, disinfect tools, and wash hands; document the service.

Timing and efficiency: acrylic sets in minutes; gel cures in seconds to minutes; plan service time to avoid rushing and to allow proper cure.

Common service errors: over-filing, product on skin, incomplete cure, and skipping dehydration; each causes lifting, discoloration, or damage.

Client communication: explain aftercare, maintenance schedule, and warning signs; provide written instructions and contact information for questions.

Acrylic application: mix liquid and powder to a creamy bead, apply to the nail in zones (free edge, then body, then cuticle area), press and shape, allow to set, then file and finish.

Gel application: apply base coat, cure, apply color or builder gel in thin layers, cure each layer, apply top coat, and cure; wipe inhibition layer if required.

Nail wraps: apply fabric or fiberglass over the nail, saturate with resin, smooth, cure or dry, then file and finish; wraps add strength but require proper resin saturation.

Nail tips: size the tip to the nail, apply glue or resin, hold until set, blend the seam, and shape; avoid glue on skin and ensure a snug fit.

Sculpting with forms: fit the form under the free edge, build the product, remove the form after set, and refine the shape; forms allow longer extensions.

Repair and rebalance: fill regrowth at the cuticle area, thin the product, and rebalance the apex; replace lifted product; do not build over lifting.

Removal methods: file down product, soak in acetone, and gently remove; use a wooden stick; never force; follow with cuticle oil and moisturizer.

Sanitation during service: keep tools on a clean towel, use a new file per client, disinfect reusable tools, and wash hands before and after.

Chemical safety: read labels and SDS; wear gloves and eye protection; avoid skin contact; keep products away from eyes and mouth; store in a cool, dry place.

Ventilation: use local exhaust or open windows; dust and vapors can irritate; wear a mask when filing or using monomers.

Waste disposal: follow local rules for chemical waste; do not pour acetone or monomers down the drain; use designated containers.

Fire safety: acetone and other solvents are flammable; keep away from flames and sparks; store in approved containers.

Allergy prevention: avoid skin contact with uncured product; use gloves; do not use products on irritated skin; patch test when indicated.

Ergonomics: adjust chair and table, keep wrists neutral, take breaks, and stretch; prevent repetitive strain injuries.

Infection control: wash hands, use disinfectant with proper contact time, and keep tools covered; do not reuse porous items.

Professional development: keep current with product safety and state rules; attend training and read manufacturer updates.

Nail shapes and structure: square, squoval, oval, almond, round, stiletto; shape affects strength and appearance; choose based on nail bed and lifestyle.

Nail plate anatomy: dorsal, intermediate, ventral layers; matrix, lunula, cuticle, eponychium, hyponychium, lateral folds, and nail bed.

Growth and health: fingernails grow about 3 mm per month; toenails about 1 mm; growth slows with age and poor circulation; systemic disease can alter growth.

Disorders and diseases: onychomycosis, paronychia, onycholysis, onychocryptosis, Beau's lines, koilonychia, pitting, and clubbing; refer suspicious findings.

Product types: acrylic, gel, wraps, tips, forms; each has specific chemistry, cure, and removal requirements; never mix incompatible products.

Sanitation and disinfection: clean, disinfect, and store tools properly; use EPA-registered disinfectants; follow contact time; discard porous items.

Client safety: assess for contraindications, patch test when needed, avoid product on skin, and refer for medical concerns.

Professional practice: follow state board rules, keep records, maintain insurance, and continue education.

Nail plate growth: matrix cells divide and keratinize; the plate moves forward over the bed; the free edge extends beyond the hyponychium.

Nail bed: skin under the plate; it is thin and contains blood vessels; injury can cause discoloration and separation.

Cuticle and eponychium: the cuticle is the dead skin layer on the plate; the eponychium is the living skin at the proximal fold; only the cuticle is removed.

Lunula: visible part of the matrix; it is white because cells are not fully keratinized; a pale or absent lunula can be normal or a sign of systemic issues.

Nail folds: proximal and lateral folds protect the matrix and guide growth; inflammation here is paronychia.

Hyponychium: seal under the free edge; it prevents debris and pathogens from entering; do not cut or push it.

Onychodermal band: narrow band at the free edge; it helps seal the nail bed; it is a landmark for product application.

Nail plate composition: keratin, water, lipids, and minerals; the plate is nonporous and has low water absorption; adhesion depends on surface prep.

Client consultation form: capture medical history, allergies, medications, occupation, and lifestyle; note any contraindications and referral needs.

Service record: date, products, batch numbers, service type, and any reactions; keep records confidential and accessible.

Sanitation log: record disinfection dates, contact times, and equipment maintenance; supports compliance with state board rules.

Product inventory: track expiry dates and storage conditions; discard expired products; keep SDS on file.

Incident report: document cuts, allergic reactions, or other incidents; note actions taken and follow-up; use for insurance and improvement.

Continuing education log: track courses, certificates, and renewal deadlines; keep copies for license renewal.

Client follow-up: check in after service for reactions; advise on aftercare and maintenance; refer to a physician if symptoms persist.

Legal compliance: post licenses, follow sanitation rules, and maintain insurance; verify current state board requirements.

Nail preparation: sanitize hands, remove old product, shape, push cuticles, buff, remove dust, dehydrate, and apply primer or base.

Acrylic mix ratio: liquid to powder should form a creamy bead; too wet causes shrinkage and lifting; too dry causes brittleness and poor adhesion.

Gel curing: match lamp wavelength to product; under-curing causes lifting and allergic risk; over-curing can cause heat spike; follow manufacturer times.

Product application: thin layers, avoid skin contact, maintain margin at cuticle and sidewalls, and seal the free edge.

Finishing: refine shape, smooth surface, apply top coat, and check balance; file free edge thin to prevent lifting.

Removal: file down, soak in acetone, and gently remove; never force; follow with cuticle oil and moisturizer.

Aftercare: keep nails dry initially, use oil, avoid using nails as tools, and schedule maintenance every 2-3 weeks.

Sanitation: use fresh files or disinfect, clean and disinfect tools, wash hands, and keep containers closed.

Nail disorders: Beau's lines, koilonychia, pitting, clubbing, onychorrhexis, and onycholysis; document and refer if suspicious.

Infections: fungal (onychomycosis) and bacterial (paronychia); contagious; stop service and refer; disinfect tools.

Allergic reactions: itching, redness, swelling at nail folds; remove product, wash, and refer; avoid future exposure.

Contraindications: open cuts, inflammation, infection, undiagnosed discoloration, and severe nail damage; refer to a physician.

Client education: explain growth, maintenance, and warning signs; provide written aftercare instructions.

Emergency response: stop service, clean wounds, cover, and disinfect; advise medical care for persistent symptoms.

Record keeping: document findings, products, and actions; supports safe future services and liability protection.

Scope of practice: cosmetic services only; do not diagnose or treat disease; refer when in doubt.

State board rules: licensing, sanitation, and scope vary by jurisdiction; verify current requirements before practice.

Informed consent: explain risks and alternatives; document client agreement.

Confidentiality: keep client records private; share only as required by law.

Advertising: describe services as cosmetic; avoid medical claims or cures.

Insurance: maintain professional liability coverage; follow safety protocols to reduce risk.

Continuing education: track hours and certificates for renewal; keep current with product safety.

Workplace safety: follow hazard communication rules; keep SDS accessible; train staff.

Professional boundaries: refer clients to medical professionals when findings are suspicious.

Nail plate thickness: about 0.5 mm at free edge; thicker at base; formed by compacted keratinocytes; cuticle is thin and nonliving.

Hyponychium and onychodermal band: seal under free edge; prevent debris and pathogens; do not cut or push.

Matrix and lunula: matrix produces plate; lunula is visible matrix; protect from trauma.

Growth rates: fingernails about 3 mm/month; toenails about 1 mm/month; middle finger fastest; thumb and little finger slowest.

Water content: about 10-30%; too much causes softness and lifting; too little causes brittleness; balance for adhesion.

pH: acidic (about 4.5-5.5); alkaline products can damage; use pH-balanced products.

Permeability: plate absorbs some substances; keep product off skin; follow safety guidelines.

Regulation: cosmetics labeling and safety requirements; keep product batch records.

Service setup: clean table, fresh towels, disinfected tools, single-use items; keep containers closed; waste container ready.

Client positioning: comfortable height, support hand, neutral wrists, good lighting.

Preparation: remove old product, sanitize hands, shape, push cuticles, buff, remove dust, dehydrate, apply base.

Application: base or primer, thin layers, cure or set, refine shape, seal with top coat.

Finishing: check edges, cuticle oil, clean table, disinfect tools, wash hands, document service.

Timing: acrylic sets in minutes; gel cures in seconds to minutes; plan to avoid rushing.

Common errors: over-filing, product on skin, incomplete cure, skipping dehydration; cause lifting or damage.

Client communication: aftercare, maintenance schedule, warning signs; written instructions.

Acrylic: mix to creamy bead, apply in zones, press and shape, set, file, finish.

Gel: base coat, cure, color or builder in thin layers, cure each, top coat, cure; wipe inhibition layer if required.

Wraps: fabric or fiberglass, saturate with resin, smooth, cure or dry, file, finish.

Tips: size to nail, glue or resin, hold until set, blend seam, shape; avoid glue on skin.

Forms: fit under free edge, build, remove after set, refine; allows longer extensions.

Repair: fill regrowth, thin product, rebalance apex; replace lifted product; do not build over lifting.

Removal: file down, soak in acetone, gently remove; use wooden stick; never force; follow with oil.

Sanitation: tools on clean towel, new file per client, disinfect reusable tools, wash hands.

Chemical safety: read labels and SDS; gloves and eye protection; avoid skin contact; store cool and dry.

Ventilation: local exhaust or open windows; mask when filing or using monomers.

Waste: follow local rules; do not pour acetone or monomers down drain; use designated containers.

Fire safety: solvents flammable; keep away from flames; store in approved containers.

Allergy prevention: avoid skin contact with uncured product; gloves; patch test when indicated.

Ergonomics: adjust chair and table; neutral wrists; breaks and stretches.

Infection control: wash hands; disinfectant contact time; keep tools covered; discard porous items.

Professional development: current product safety and state rules; training and manufacturer updates.

Nail shapes: square, squoval, oval, almond, round, stiletto; shape affects strength and appearance.

Anatomy: dorsal, intermediate, ventral layers; matrix, lunula, cuticle, eponychium, hyponychium, lateral folds, nail bed.

Growth: fingernails about 3 mm/month; toenails about 1 mm; slows with age and poor circulation.

Disorders: onychomycosis, paronychia, onycholysis, onychocryptosis, Beau's lines, koilonychia, pitting, clubbing; refer suspicious findings.

Products: acrylic, gel, wraps, tips, forms; specific chemistry, cure, removal; never mix incompatible products.

Sanitation: clean, disinfect, store; EPA-registered disinfectant; contact time; discard porous items.

Client safety: assess contraindications, patch test, avoid product on skin, refer medical concerns.

Professional practice: state board rules, records, insurance, continuing education.

Matrix: cells divide and keratinize; plate moves forward; free edge extends beyond hyponychium.

Nail bed: thin skin under plate; blood vessels; injury causes discoloration and separation.

Cuticle and eponychium: cuticle is dead layer on plate; eponychium is living skin at proximal fold; only cuticle removed.

Lunula: visible matrix; white because cells not fully keratinized; pale or absent can be normal or systemic.

Nail folds: proximal and lateral protect matrix and guide growth; inflammation is paronychia.

Hyponychium: seal under free edge; prevents debris and pathogens; do not cut or push.

Onychodermal band: narrow band at free edge; helps seal nail bed; landmark for product application.

Composition: keratin, water, lipids, minerals; nonporous; low water absorption; adhesion depends on prep.

Consultation form: medical history, allergies, medications, occupation, lifestyle; note contraindications and referrals.

Service record: date, products, batch numbers, service type, reactions; confidential and accessible.

Sanitation log: disinfection dates, contact times, equipment maintenance; supports compliance.

Inventory: track expiry dates and storage; discard expired; keep SDS on file.

Incident report: document cuts, allergic reactions, actions taken, follow-up; use for insurance and improvement.

Continuing education log: courses, certificates, renewal deadlines; keep copies.

Follow-up: check in after service; advise aftercare; refer if symptoms persist.

Legal compliance: post licenses, follow sanitation rules, maintain insurance; verify state board requirements.

Preparation: sanitize hands, remove old product, shape, push cuticles, buff, remove dust, dehydrate, apply primer or base.

Acrylic ratio: creamy bead; too wet causes shrinkage and lifting; too dry causes brittleness and poor adhesion.

Gel curing: match lamp wavelength; under-curing causes lifting and allergy risk; over-curing heat spike; follow times.

Application: thin layers, avoid skin contact, margin at cuticle and sidewalls, seal free edge.

Finishing: refine shape, smooth surface, top coat, check balance; file free edge thin.

Removal: file down, soak in acetone, gently remove; never force; follow with oil and moisturizer.

Aftercare: keep nails dry initially, use oil, avoid nails as tools, maintenance every 2-3 weeks.

Sanitation: fresh files or disinfect, clean and disinfect tools, wash hands, keep containers closed.