Acrylic (Liquid and Powder) Nail Application
Acrylic questions are about ratio and placement. The exam wants you to know why a bead behaves the way it does, where product goes thin or thick, and what causes lifting, bubbles, and discoloration.
Chemistry and ratio
- Powder polymer plus liquid monomer sets by polymerization. Ethyl methacrylate (EMA) is the standard salon monomer. Methyl methacrylate (MMA) is prohibited by many state boards and should never be used on natural nails - it is hard, brittle, and difficult to remove.
- Correct ratio is a medium bead: it holds its shape, does not run, and does not look dry or stringy. Too wet means excessive shrinkage, lifting, and yellowing; too dry means brittleness and a cloudy, porous finish.
- Warm, humid rooms accelerate set; cold rooms slow it. Working time changes with the environment, not with the client's preference.
Application logic
- Prep: remove non-living cuticle from the plate without cutting living tissue, dehydrate, apply primer only if the system requires it, and do not touch the plate afterward.
- Zones: free edge thin, stress zone with the apex, cuticle zone thin and feathered. Product touching skin or cuticle creates a ledge that lifts.
- Cure fully, then refine with an e-file, buff, clean dust, and finish with top coat. Never over-file into the natural plate.
- Keep the monomer bottle closed, work in a ventilated area, avoid skin contact, and dispose of waste properly.
Worked example
A client returns in five days with lifting along both cuticle lines. Reasoning: the bead was too wet, so the product shrank away from the natural plate as monomer evaporated; product had flooded the cuticle and cured on skin rather than on nail; prep did not remove the non-living cuticle seal; and the cuticle zone was left too thick. Correcting one cause alone will not hold - ratio and placement must both change.
Traps that cost marks
Choosing MMA for "strength"; deliberately wet beads; product on skin; skipping dehydration; reusing contaminated monomer; and over-filing the natural nail during finish work.