Professional usage: Step 1. Clean Nails then trim nail surface as normal manicure process. Step 2. Fully shake up the polish, it can make the polish color be balanced. (Important) Step 3. Apply Base coat first. Make sure to apply a smooth even coat that is neither too thick or too thin. Cure under a UV light for 1 minute or an LED light for 30 seconds. (Necessary) Step 4. Apply polish directly, cure with UV lamp for 2-3 minutes or cure with LED lamp for 60 second; when dry, apply the 2nd layer and cure with UV lamp or LED lamp again. Step 5. Apply the top coat. Cure under a UV light for 1 minute. (30 seconds for an LED light) Step 6. Clean nail surface with nail cleanser. Note: avoid using non specialized cleansing fluids as they may interfere with the quality of the final gloss coat.To Remove: Step 1. Soak off the nails into acrylic remover for about 5 minutes, Step 2. Rip down the whole piece of nail enamel gently on each nail. Gentle Reminder: 1. Avoid all skin contact. If redness or other signs of adverse reaction occur, discontinue use immediately. 2. Keep tightly sealed. Keep out of sunlight. Keep out of reach of children.