This product is colorless, waterproof, resistant to good, not yellow, can make the work to maintain the original color, level and texture. Can more effectively protect the picture. Suitable for drawing, charcoal, dry powder painting and other works. Using method: Jiggle several times before use, facing the picture of the nozzle, at a distance of picture about 20-30 cm light by sprinklers, let the fog agent to evenly cover the screen, after a few minutes is dry. If the work needs, can be repeated several times to increase the thickness of the protective layer, but should not cover too much. Usage: Shake gently several times before use, The nozzle is facing the picture, and gently press the nozzle about 20-30 cm away from the picture, so that the fogging agent can cover the picture evenly.