The Dangers of Under-Curing & Contact Allergies
Gel polish consists of liquid oligomers, monomers, and photo-initiators. When exposed to specific UV/LED wavelengths, the photo-initiators trigger an exothermic polymerization chain reaction that turns liquid into solid plastic.
If you use a weak 6W lamp or cure for too little time, the surface can feel dry to the touch while the core remains a soft, toxic liquid. Uncured acrylates continuously leach through the porous nail plate into living tissue, triggering permanent, incurable allergies to dental resins, joint replacements, and artificial nails. Always invest in a certified 36W-48W lamp and cure for the full recommended time.
The 'Thin Layer' Discipline
Applying gel polish like regular air-dry polish (in thick heavy coats) blocks UV light from penetrating to the lower layers, causing the top to shrink and wrinkle like a raisin.
Wipe one side of your brush completely against the bottle neck. Apply paper-thin coats with light pressure, leaving a 0.5mm margin before the cuticle skin. Two thin coats cure rock-hard; one thick coat will peel in 2 days.