NABTEB Cosmetology common mistakes
NABTEB Cosmetology · Understand the traps and how to avoid them.
Writing sterilisation and disinfection as if they were the same process, and describing 'sterilising' combs and clippers with a spray or a bowl of disinfectant.
Candidates memorise the words as a vocabulary list without linking each term to a method and an outcome, so the distinction collapses under exam pressure and any 'kills germs' answer feels acceptable.
What to do instead
Learn one anchor definition each: disinfection reduces pathogens on tools to a safe level (chemical disinfectant, correct dilution and contact time); sterilisation destroys all micro-organisms including spores (autoclave or similar). Then practise sorting every salon item into a category: porous/non-porous, blood-contact/non-blood-contact, and state the method you would use for each. If a question mentions a spray bottle and a wipe, the answer is disinfection, not sterilisation.
Answering hygiene questions only in terms of tools and forgetting the practitioner, the client and the environment - no mention of handwashing before and after service, clean towels per client, or waste disposal.
Textbook chapters present 'salon hygiene' as an equipment topic, so candidates treat it as a single box rather than a chain of infection-control steps covering hands, linen, surfaces and waste.
What to do instead
Build a mental checklist of four routes: hands (wash and dry before and after every client, cover cuts), linen (fresh towel per client, laundered at high temperature, never reused from the floor), surfaces (workstation, trolley, chair wiped between clients), waste (pedicure clippings, used blades, cotton wool in lidded bins). When a scenario question appears, run through all four and name the specific step the scenario omitted.
Describing a tool's use without its safety rule or maintenance routine - for example naming a cut-throat razor but not stropping and blade angle, or naming nail nippers but not sharpening, oiling and correct grip.
Candidates revise 'what is this tool for' from pictures and skip the second half of each tool's entry (care, safety, when to retire it), which is where the marks usually sit.
What to do instead
For every implement on your list, write three lines: purpose, safety rule (angle, grip, direction of cut, PPE), and maintenance (clean, disinfect, oil, sharpen, store). Recite them aloud. In an exam answer, always add the safety and maintenance sentence even if the question only asks 'what is it used for' - it demonstrates trade competence and often earns the extra mark.
Confusing the hair structure and growth phases: saying the medulla is the outer layer, treating the cortex and cuticle as interchangeable, or mixing up anagen, catagen and telogen.
The three layers and three phases are learned as lists of names with no physical picture, so they blur together and candidates guess under time pressure.
What to do instead
Draw the hair as a cross-section from memory: cuticle outside (overlapping scales, protects, where conditioners and colour work), cortex in the middle (keratin, melanin, where perming and bleaching change the bonds), medulla in the centre (often absent in fine hair). For growth, link each phase to a fact you can state: anagen is active growth and the longest phase, catagen is transitional, telogen is resting with shedding at the end. Label the diagram in your own words and re-draw it weekly.
Treating chemical services as recipes - quoting a perm or relaxer process without a patch test, strand test, porosity or elasticity check, or without stating manufacturer's instructions and client consultation.
Candidates learn the mechanical steps (apply, process, rinse) and drop the pre-service checks, which are the parts examiners use to test professional judgement.
What to do instead
For every chemical service, memorise the pre-service checklist in order: consultation and record card, patch test (typically 24–48 hours before, per manufacturer), skin and scalp inspection, strand/porosity/elasticity test, then product selection and timing. Practise writing a full answer that begins with the checks and ends with aftercare advice. If a question asks 'what would you do first', the answer is almost always a test or consultation, not application.
Answering skin-care and facial questions with generic 'cleanse, tone, moisturise' and omitting skin analysis, skin type identification, contraindications and client consent.
Candidates absorb the marketing routine and never learn the professional sequence that precedes it, so they cannot distinguish a facial treatment plan from a home-care advert.
What to do instead
Learn the facial as a staged procedure: consultation and consent, skin analysis under good light (type, condition, sensitivity, lesions), contraindication check, cleanse, exfoliate, steam/extraction where appropriate, massage, mask, moisturise and protect, then home-care advice. Be ready to name at least two contraindications (for example active infection, recent chemical peel, open lesions) and what you would do instead, such as referring the client.
Confusing nail anatomy and nail disorders - calling the cuticle the nail plate, mislabelling the lunula or matrix, or describing a fungal infection as something a manicurist should treat.
Nail diagrams are studied visually but not verbally, so the names are not firmly attached to the structures, and the boundary between cosmetic care and medical treatment is never made explicit.
What to do instead
Label a nail diagram from memory in words: nail plate, nail bed, matrix (where growth occurs), lunula (visible matrix), cuticle and eponychium, free edge, side walls, hyponychium. Then write a firm rule: the manicurist beautifies and maintains healthy nails and refers anything suspicious (discolouration, thickening, separation, swelling, pain) to a medical professional. Never answer that you would 'cut away' or 'cure' a nail disease.
Mixing up product chemistry - describing shampoo as acidic when it is alkaline, confusing a conditioner's role with a shampoo's, or failing to explain pH, surfactants and the difference between temporary, semi-permanent and permanent colour.
Chemistry is the section candidates fear most, so they skim it and rely on half-remembered phrases like 'shampoo opens the cuticle', which then produce contradictory answers.
What to do instead
Anchor each product to one function and one fact: shampoo contains surfactants that lift oil and dirt (typically alkaline, which is why the cuticle lifts); conditioner is acidic and smooths the cuticle back down; colour categories differ by how deeply they penetrate (temporary coats, semi-permanent deposits in the cuticle, permanent enters the cortex with developer). Learn the pH scale direction and the role of hydrogen peroxide as a developer. Write each fact as a one-line 'because' sentence so you can explain, not just state.
Giving business and ethics answers as slogans ('be professional', 'the customer is always right') without pricing, record-keeping, consent, confidentiality or complaint-handling specifics.
Candidates treat the business domain as common sense and do not revise it, so they cannot produce the concrete procedures examiners want, especially in scenario questions.
What to do instead
Revise five concrete procedures: how to cost a service (materials plus time plus overhead plus profit margin), what goes on a client record card (date, service, products, patch test, reactions, consent), how to keep client information confidential, how to handle a complaint step by step (listen, acknowledge, investigate, remedy, record), and the difference between a professional obligation and a legal one. Answer scenario questions by naming the procedure and the document involved.
Answering practical-conduct questions as if only the technical result matters - no greeting, no gowning and draping, no consultation, no checking comfort, no aftercare or home-care advice, no cleaning of the station afterwards.
Candidates picture the service from the client's chair (the haircut, the polish) and forget that the assessor is watching the whole professional encounter from arrival to departure.
What to do instead
Rehearse every service as a fixed sequence with a beginning, middle and end: greet and seat, gown and protect, consult and agree, wash hands, perform, check comfort and result with the client, give aftercare advice, clean and disinfect tools and station, record and rebook. Practise saying the sequence aloud for haircut, shave, manicure and facial until it is automatic, then use it to structure any written scenario answer.