DND - Whole Collection Sample Chart (15 Sets) Brand: DND Type: Set Product Color chart displaying all 36 colors Country/Region of Manufacture: United States Following a professional 3 step gel system: DND Gel Polishes needs to be cured under a LED lamp, used with the DND Base Gel and DND Top Gel. Matching nail lacquers need to air dry. 1. Starting with completely clean and prepped nails, apply a single coat of DND base gel and cure for 30 seconds in a LED lamp 2. Apply a single thin layer of gel color and cure for 30-45 seconds in a LED lamp 3. Apply the second thin layer of gel color and cure for 30-45 seconds in a LED lamp 4. Apply DND top coat no cleanse and cure for 30 seconds in a LED lamp 5. Applying thick layers of gel color can result in an uneven cure leading to chipping and peeling. Make sure to hydrate daily by moisturizing the cuticles.