Acrylic and Gel Nail Application
Liquid-and-powder and gel systems are the highest-value services on the menu and the most chemistry-heavy items on the exam. Questions target mix ratio, curing mechanism, removal, and prevention of allergic reactions.
Acrylic (liquid and powder)
The monomer liquid is mixed with polymer powder to form a bead that hardens by chemical reaction - no lamp involved. Ethyl methacrylate (EMA) is the salon standard. Methyl methacrylate (MMA) is banned or restricted by many state boards and has been warned against by the FDA because of its hardness and poor solvent removal; know which system you are buying. Primer improves adhesion (acid-based primers require care around skin); a dehydrator removes surface moisture. Mixing ratio matters: a bead that is too wet shrinks, traps bubbles, and increases skin exposure; too dry a bead is brittle and lifts at the cuticle. Never touch uncured product to skin - repeated skin contact causes acrylate sensitization, an allergy that ends a career.
Gel
Gel cures only under a UV or LED lamp, is odorless, and is applied in thin layers: base, builder, then top coat. The tacky inhibition layer is wiped with cleanser after curing. Thin layers cure fully; thick layers under-cure and cause service breakdown and reactions. Replace lamp bulbs on schedule - a weak lamp produces undercured, lifting product.
Removal
File through the top seal, then soak in acetone for 10–15 minutes with foil or a soak bowl, re-covering as needed. Never pry or force product off; that removes plate layers.
Worked example
A client's new set lifts at the cuticle within four days. The cause list: product applied on the skin, excessive moisture left on the plate, no bonding step, or a bead ratio too wet, causing shrinkage away from the cuticle. Correct technique: dehydrate, keep product off the skin, use a medium bead, and press the product thin at the cuticle.
Traps
- Calling gel "cured by air" or acrylic "cured by lamp."
- Using MMA and assuming the label settles the question.
- Applying gel thickly to save time.
- Prying product off instead of soaking.