IN Cosmetology common mistakes
IN Cosmetology · Understand the traps and how to avoid them.
Treats disinfection as a quick spray-and-wipe: wipes implements with a disinfectant, lets them dry for a few seconds, returns them to the drawer, and reuses porous items (emery boards, buffer blocks, nail brushes, wooden sticks, pumice) on the next client.
Salon habit and label-skimming. Candidates memorize the word 'disinfectant' but not the required contact time, and they assume an item that looks clean after brushing off debris is safe to reuse.
What to do instead
Drill the full chain - clean (remove all debris) → rinse/dry → disinfect by complete immersion in an EPA-registered hospital-grade tuberculocidal product for the label's stated contact time (commonly 10 minutes) → dry and store covered. Classify every implement by porosity: anything porous or unable to be disinfected is single-use and is discarded, not wiped.
Cuts a one-length (blunt) haircut while holding the hair out at 90 degrees instead of at natural fall, and takes horizontal sections wider than the curve of the head so the guide line is lost between subsections.
Elevation and projection get confused, and the candidate copies a layered-cut hand position because it feels more controlled, then answers the theory question the same way.
What to do instead
Tie every result to a number: one-length = 0 degrees at natural fall with fine, even subsections; graduated = 45 degrees; uniform layer = 90 degrees. Before answering, translate the described cut into three things - elevation, section size/parting, and type of guideline (stationary, traveling, or non-stationary) - so the term and the hand position are always paired.
Mixes up on-base, half-base, and off-base wet-set placement, for example claiming that off-base placement gives maximum volume and a tight curl at the scalp.
The three terms sound interchangeable and candidates memorize the slogan 'more base equals more volume' without mapping it to where the tool physically sits relative to its base.
What to do instead
Learn the mapping in both directions: on-base = tool rests directly on its base, maximum volume at the scalp; half-base = tool is held one-half base off the scalp, moderate volume; off-base = tool is beyond the base, little or no volume and a strand that lies closer to the head. Self-test by predicting volume from a placement name, then predicting placement from a described finished style.
Rinses the relaxer or wave solution for only a few seconds, blots once, then applies neutralizer to hair that is still dripping wet - or rinses the neutralizer out well before the manufacturer's stated time.
The neutralizer is mentally filed as a 'rinse-out conditioner' step rather than the chemical step that rebuilds the disulfide bonds, so it gets rushed.
What to do instead
Memorize order, purpose, and failure mode: complete processing → thorough rinse free of all product residue → blot excess water (dilution weakens the neutralizer) → apply neutralizer to full saturation → leave for the entire labeled time → rinse. Be able to state that incomplete neutralization leaves hair swollen, weak, and prone to breakage and leaves residual curl/relaxer activity.
Formulates a single-process tint to move a client from a dark level (for example level 3) to a light level (for example level 9) and expects it to lift and deposit correctly, with no consideration of the hair's contributing (underlying) pigment.
The level system is treated as a simple number line, and candidates forget that tint lifts only a limited number of levels and that warmth is revealed as melanin is removed.
What to do instead
Use the level system plus the law of color together: darker levels hold more contributing red/orange pigment, a single-process tint generally lightens only about 2 to 4 levels, and greater lift requires a pre-lightening step. For each formula question, first identify starting level, target level, and the underlying pigment exposed at the target, then decide whether one process can get there.
Performs a scalp analysis by eye only, then proceeds with shampoo and scalp massage on a client with visible crusting, redness, or open lesions, answering exam items as though contagious conditions were treatable in the salon.
Candidates are focused on completing the service routine and are reluctant to refuse; they also blur the line between cosmetic conditions (dry scalp, dandruff) and medical or contagious ones.
What to do instead
Build a screening sequence: part the hair in several places, inspect with gloves under good light, and ask about medications and recent scalp problems. Sort conditions into three buckets - treatable in salon (dry scalp, pityriasis/dandruff), refer to a physician (abrasions, inflamed lesions), and refuse service (ringworm, impetigo, pediculosis) - and be able to name an example in each bucket.
Over-files the nail plate at the sidewalls and around the eponychium with a coarse file or e-file bit until the plate is visibly thinned (rings of fire), and services a client whose nail fold is red, swollen, and pus-filled.
Speed pressure plus the belief that deeper abrasion 'cleans' the nail, and the signs of infection or contraindicating conditions are not recognized at a glance.
What to do instead
Practice the light-touch rule: fine grits, one-direction filing, and no filing into the sidewalls or sealing the eponychium. Memorize nail contraindicators by name and appearance (paronychia, onychomycosis, Pseudomonas/bacterial infection, severe onycholysis) and pair each with the correct action - refer, do not service. Be able to explain that rings of fire come from improper filing technique, not from product.
Runs the same facial routine - massage and extractions included - over inflamed acne, boils, or couperose areas, and waxes a client on isotretinoin, retinoids, or recent chemical peels without changing the service.
Routine-following and an incomplete intake; the contraindication list is memorized as a list of words rather than as decision rules that change what is done in the room.
What to do instead
Take a medication and recent-treatment history before every facial or wax, and match each contraindication to a specific action: avoid the area, omit the modality (massage, heat, extractions, wax), or refer out. Learn direction rules for facial massage (upward and outward, avoiding areas of inflammation) and the steps that must be omitted for acne, couperose, and sensitive skin.
Prices a retail product with a flat dollar add-on (cost plus $2) or a guessed discount, answers 'profit' questions with revenue figures, and uses commission and booth-rent income interchangeably when computing take-home pay.
Arithmetic shortcuts substitute for formulas, and business vocabulary is used loosely because the terms sound similar in ordinary speech.
What to do instead
Write the formulas down and apply them: retail price = cost divided by (1 minus the markup percentage), or cost times (1 plus the markup percentage) when markup is stated on cost; profit = revenue minus total expenses. Work problems that state exactly which figure is requested, confirm whether markup is on cost or on retail price, and check units and percentages before selecting an answer.
Answers Indiana rules questions as if licensure and sanitation were just salon policy - assuming a limited license (manicurist or esthetician) authorizes haircutting or chemical hair services, assuming an out-of-state license transfers automatically, or assuming a booth renter is exempt from the salon's sanitation requirements.
Candidates study for the practical service domains and skim the law and administrative-rule section, so state-specific scope of practice, licensure, and inspection requirements get filled in with assumptions from other states.
What to do instead
Study the Indiana material as its own block: know which licenses exist and what each is authorized to perform, how licensure by endorsement works, that licensees and salons are subject to board inspection and sanitation rules, and which records and postings are required. For each rule, write the specific scenario it governs, and verify anything uncertain against the current statute and the board's administrative rules rather than guessing.