Gel & UV Services – Nail Technician License Exam

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Photoinitiators in the gel absorb light energy and trigger polymerization, converting the liquid monomer into a hardened polymer network.

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Hard gel forms a dense, cross-linked polymer network that cannot be dissolved by acetone and must be filed off, while soft gel has a less cross-linked structure that allows acetone to break it down for removal.

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Photoinitiators are chemical compounds that absorb specific wavelengths of light and generate free radicals, which start the polymerization (curing) reaction in gel products.

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Gel polish is a hybrid product that combines features of traditional nail polish and gel; it is applied like polish, cures under UV/LED light, and is removed by soaking in acetone.

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The inhibition layer is a thin, uncured surface of gel caused by oxygen interfering with polymerization; it allows subsequent gel layers to bond chemically to the previous layer.