CSLB General Building (B) — All Questions

In a liquid-and-powder (acrylic) service, how do the products actually harden?

• a.The liquid is the polymer and the powder is the monomer, and the bead hardens only after it goes under an LED lamp.
• b.The liquid monomer and the powder polymer, with an initiator, join together in polymerization — a heat-releasing (exothermic) reaction that cures without any lamp.✓
• c.The powder carries photoinitiators, so the bead will not form chains until UV light reaches it.
• d.Polymerization is a cooling reaction, so a properly mixed bead feels cold to the client as it sets.

Liquid-and-powder systems are a monomer (liquid) plus a polymer (powder) with a catalyst/initiator; when they meet, the small monomer units link into long chains in polymerization. That reaction gives off heat, which is why a client may feel warmth, and it needs no lamp at all. The choices that reverse monomer and polymer, or that require a lamp or photoinitiators, describe UV/LED gel, not liquid-and-powder; and polymerization releases heat rather than absorbing it.

You cure a client's gel in a lamp that was not made for that gel line. Within a week the gel is lifting at the edges and she says her fingertips itch. What is the most likely cause?

• a.The photoinitiators in the gel never received the wavelength and lamp output they need, so the coating stayed under-cured — under-cured gel lifts and the uncured chemical on the skin can cause sensitization.✓
• b.The gel was cured too thoroughly, which always makes gel brittle and makes it peel off in a week.
• c.Gel does not really need a lamp; the lifting comes from the base coat alone and the itching is unrelated to the product.
• d.Lifting and itching together prove that the client is allergic to acetone.

UV/LED gel only polymerizes when its photoinitiators are struck by the correct wavelength and intensity, so the wrong lamp leaves the coating partly liquid inside. Under-cured gel bonds poorly and lifts, and the uncured ingredients that reach the skin are exactly what drives allergic sensitization. Over-curing is not what caused this, gel absolutely does require a matched lamp, and acetone was not part of this service.

A newly hired technician pours acid (methacrylic acid) primer into an open dish and brushes it over the whole nail and the surrounding skin so the acrylic will 'really stick.' What should you tell her?

• a.Acid primer is harmless on skin; only breathing the vapor is a concern.
• b.Flooding the skin is fine as long as she wipes the skin off after the enhancement has cured.
• c.She should use even more primer, because more primer always means less lifting.
• d.Acid primer is corrosive: wear gloves and eye protection, apply a sparing amount to the natural nail plate only, and never let it touch skin.✓

Methacrylic acid primer is corrosive to skin and eyes, so it calls for gloves, eye protection and a very small amount applied only where the enhancement will sit on the natural nail. Getting it on the skin can burn and it also feeds allergic sensitization, so wiping it off later does not undo the contact. More primer does not improve retention — proper prep and a thin, sparing application do; a non-acid primer is the gentler alternative.

A client arrives wearing gel polish and hard enhancements and wants everything removed today. Which statement about the removal solvents is correct?

• a.Ethyl acetate (non-acetone) removes gel and enhancements faster than acetone does.
• b.Acetone is non-flammable, so an open bowl of it can safely sit next to a lit candle on the table.
• c.Acetone dissolves polish, gel and enhancements quickly, while ethyl acetate (non-acetone) is slower and gentler; acetone is flammable and drying, so keep it capped and away from any flame.✓
• d.Non-acetone remover is the stronger product and should be used on enhancements, while acetone is only for plain polish.

Acetone is the fast, aggressive solvent that will break down polish, gel and acrylic, but it is flammable and it strips oils from the nail and skin, so it belongs in a closed container away from heat and flame. Ethyl acetate is the slower, gentler non-acetone solvent used mainly on regular polish. The options calling non-acetone faster or stronger have it backwards, and calling acetone non-flammable is a serious safety error.

While applying nail tips you squeeze a large drop of adhesive onto each tip so it will 'hold longer.' What actually happens?

• a.Tip and wrap adhesive is a cyanoacrylate that bonds best in a thin layer; too much floods out onto the skin, traps air pockets, sets slowly and unevenly, and the tip lifts or pops off.✓
• b.A thicker layer of cyanoacrylate always creates a stronger, longer-lasting bond than a thin one.
• c.The extra adhesive acts as a primer, so no other nail preparation is needed.
• d.Cyanoacrylate only sets under a UV lamp, so how much you use makes no difference.

Cyanoacrylate adhesive cures fastest and strongest as a thin film between two close-fitting surfaces, so a thin even layer is what holds a tip on. A heavy drop squeezes out onto the skin, leaves air bubbles under the tip and cures unevenly, which is a common cause of lifting and popped-off tips. Adhesive is not a primer and does not replace prep, and cyanoacrylate cures chemically — often with an activator — not under a lamp.

A client's enhancements lift within a few days every single time. Her nail plates look shiny and feel oily. What is the correct way to improve adhesion?

• a.File the natural nail plate down thin until the product finally holds.
• b.Clean and dry the plate, remove surface oil and moisture with a dehydrator, and lightly buff off the shine with an appropriate abrasive before applying product.✓
• c.Skip washing her hands so the natural oils help the product grip the plate.
• d.Apply a much thicker bead of product so its weight can overpower the oil.

Adhesion needs a clean, dry, oil-free surface plus a little mechanical grip, so the correct sequence is cleaning, a dehydrator to take off surface moisture and oil, and a light roughening of the shine. Filing the natural nail thin to force a bond weakens and damages the plate and is never acceptable. Leaving oils in place is exactly what causes lifting, and a thicker bead only adds weight and stress to a bond that was never clean to begin with.

What does the overexposure principle mean for a nail technician?

• a.Only products labeled as toxic can cause a reaction, so products considered safe may freely touch the skin.
• b.One single splash of any product permanently sensitizes you, so an accidental spill ends a nail career.
• c.Repeated or prolonged contact with a product — even one that is safe in normal use — can build up a sensitivity, and once you become allergic you stay allergic, so keep products off the skin and use gloves and good ventilation.✓
• d.Overexposure only matters for clients, because technicians build up immunity to the products over time.

Overexposure describes a dose problem: the amount and the number of times a chemical touches you or is breathed in, day after day, is what creates sensitization. Once a person is sensitized to a monomer or gel ingredient, the allergy is generally lifelong, so prevention means keeping product off the skin, wearing gloves and ventilating at the source. It is not limited to 'toxic' products, it is not usually caused by one splash, and technicians do not develop immunity — their risk goes up with exposure, not down.

A regular gel client returns with itching, redness, swelling and small blisters on the skin around several nails and on her eyelids. Looking back, gel often flooded her sidewalls and cuticle area. What should you do?

• a.Repeat the same gel service but cure it twice as long to burn off whatever is irritating her.
• b.Tell her it is a nail fungus and sell her an antifungal product to use at home.
• c.Switch her to a stronger acid primer so the primer seals the skin from the gel.
• d.Stop the gel service, explain that what you see looks like an allergic contact reaction most likely from product touching the skin, refer her to a physician, and afterward keep product off the skin and cure fully.✓

Itching, redness, swelling and blistering on the fingers, eyelids or face is the classic pattern of allergic sensitization to a nail product, and gel flooding the skin plus under-curing is the usual cause. The manicurist's job is to stop the service, describe what is seen without diagnosing, refer the client to a physician, and correct the technique so product never touches skin. Curing longer, calling it a fungus and selling a treatment, or adding a corrosive acid primer to skin all make the exposure worse.

During an inspection the inspector finds monomer poured into an unlabeled sports-drink bottle, sitting open on a shelf next to the salon's water heater. What is wrong with this?

• a.Products must stay in their original closed, labeled containers, stored cool and away from heat and open flame — never decanted into unlabeled or food and drink containers.✓
• b.Nothing is wrong, because the technician who poured it knows what is in the bottle.
• c.It is acceptable as long as the bottle is used up within a week and then thrown away.
• d.Only disinfectants have to be labeled; professional nail products are exempt from labeling.

Every chemical in the salon has to be identifiable to employees and to the inspector, which is why products stay in their original labeled containers, kept closed, cool and away from heat and flame. A drink bottle is the worst possible choice because someone can swallow the contents, and an unlabeled container also defeats the right-to-know rules and the matching Safety Data Sheet. Personal knowledge, short-term use, and the idea that only disinfectants need labels are all incorrect.Cal/OSHA Hazard Communication Standard (8 CCR §5194)

Which statement about pH is correct for nail and skin care?

• a.Pure water is strongly acidic at pH 7, and the natural nail plate is alkaline.
• b.Pure water is neutral at pH 7, while the skin and the natural nail plate are slightly acidic; strongly alkaline products swell and soften keratin.✓
• c.The higher the pH climbs, the harder and tighter the keratin of the nail becomes.
• d.pH has no effect on the nail plate at all, because the plate is made of dead keratin.

On the pH scale, 7 is neutral — that is pure water — and the skin and nail plate normally sit slightly below 7, on the acidic side. Products that are strongly alkaline raise the pH, causing keratin to absorb water, swell and soften, which is why harsh alkaline products can leave the plate weak or over-softened. Water is not acidic, a high pH softens rather than hardens keratin, and even dead keratin still reacts chemically to pH.