It is a flake that can make a mysterious coloring glittery like an aurora. Please use PREGEL CANGEL Non-Wipe Top Gel for the base coat when using this item. 【Precautions for Use】· Wear appropriate protective equipment such as mask, goggles, etc. during use, so that dust does not enter the eyes or respirator. · Do not eat, drink or smoke while using. · Wash hands thoroughly after use, please change clothes that contaminated. · Keep tightly closed after use, please keep in a dry place out of reach of children. · As this product uses silver, it may discolor black by combining with the sulfur content in the air.