Cert III Hairdressing common mistakes
Cert III Hairdressing · Understand the traps and how to avoid them.
Skipping or rushing the pre-service skin and scalp patch test before a colour service, then treating the client without any documented check.
Candidates memorise the patch test rule but treat it as paperwork; under time pressure in a simulated salon they jump straight to mixing colour and forget to record the result or observe the 48-hour window.
What to do instead
Build the patch test into a fixed service sequence: consult, patch test and record date/result in the client record, then mix. Practise saying the 48-hour rule aloud to the client and writing the entry, so it becomes an automatic step rather than an afterthought.
Failing to identify contraindications during consultation, such as a history of reaction, open scalp lesions, recent henna or metallic salt colour, or incompatible previous chemical services.
Candidates focus on the desired look and gloss over the health questions because they fear losing the service; they also lack confidence in what counts as a true contraindication versus a caution.
What to do instead
Use a structured consultation checklist covering allergies, medication, pregnancy, scalp condition and full chemical history including box dyes. Learn the specific contraindications and rehearse explaining a refusal or modification professionally, so the safe answer feels scripted rather than confrontational.
Mixing developer and colour in the wrong ratio or choosing the wrong strength for the target lift, then blaming the product when the result is off.
Candidates rely on vague memory of '10, 20, 30, 40 volume' without linking strength to lift and deposit, and they do not weigh or measure accurately under exam timing pressure.
What to do instead
Drill the ratio and strength logic until it is automatic: state the target level, the natural level, the required lift, and therefore the developer strength and ratio before touching product. Practise measuring with scales and colour remover charts, and write the calculation down rather than estimating.
Sectioning hair too thickly or at inconsistent angles when cutting, so the guide line is lost and the perimeter or graduation is uneven.
Candidates chase speed and try to match the model's hair volume in fewer sections; they also fail to keep tension and elevation constant between sides.
What to do instead
Cut on clean, evenly damp hair with subsections no wider than the section below, and re-check the guide line after every subsection. Use consistent tension and elevation, and cross-check by combing the hair into its natural fall and comparing both sides before finishing.
Under-neutralising or rinsing too briefly after a chemical wave or relaxer, leaving residual chemical that damages the hair or causes curl relaxation.
Candidates treat neutraliser as a quick rinse step and underestimate processing time; they also fail to blot excess water before applying neutraliser, which dilutes it.
What to do instead
Follow the manufacturer's neutralising time exactly, blot the hair before applying, and use test curls to confirm the wave before neutralising. Rinse thoroughly, then check pH or use the product's indicator, and record timings so the process is repeatable.
Poor shampoo basin ergonomics and hygiene: standing twisted, not supporting the client's neck, reusing a towel, or leaving water and product on the floor.
Candidates concentrate on the massage technique and forget their own posture and the surrounding environment; hygiene routines are treated as obvious and skipped in timed practice.
What to do instead
Set up the basin before the client sits: clean towel, correct neck support, adjustable chair height, and a clear dry floor. Stand with feet hip-width and keep the wrist neutral, and finish every service with a wipe-down and towel change as a signed-off checklist item.
Giving a blow-dry or finish that ignores the cut's shape, using excessive heat on the same section, or failing to section for volume and direction.
Candidates try to dry the whole head at once to save time, hold the dryer too close, and do not link the styling direction to the desired finished shape.
What to do instead
Section the hair and dry from root to tip with the nozzle pointed down the hair shaft, keeping the dryer moving and at a safe distance. Plan the finish before starting: state where volume, direction and smoothness are needed, and check the result against the cut before the client leaves.
Handling a client complaint or a difference of opinion about the service by becoming defensive or over-promising a fix that cannot be delivered.
Candidates are anxious about assessment and take criticism personally; they also lack a script for acknowledging a problem without admitting fault they cannot verify.
What to do instead
Use a calm acknowledgement-and-investigate response: listen fully, restate the concern, check the record and the hair, then offer realistic options within your scope. Escalate to a senior stylist when needed, and practise the wording so it is ready before the situation arises.
Disposing of colour waste, bleach, foils and sharps incorrectly, or mixing leftover product 'for later' without labelling.
Candidates focus on the technical result and treat clean-up as unskilled; sustainability and waste rules are often the least-revised part of the syllabus.
What to do instead
Learn the salon's waste streams and apply them every practice session: colour waste to the designated container, sharps to the sharps bin, foils recycled, and any decanted product labelled with contents and date. Treat correct disposal as part of the service, not an optional extra.
Failing to communicate and confirm the service plan with the client, including cost, time and likely maintenance, before starting work.
Candidates assume the brief is obvious from a photo and skip the confirm-back step; they also avoid discussing price and aftercare because it feels awkward.
What to do instead
End every consultation by summarising the plan, the products, the expected time and cost, and the home-care requirements, then ask the client to confirm. Rehearse the summary as a short scripted close so it is delivered confidently and recorded in the client's notes.