Powertex Bister Powder is available in a variety of different shades in practical 40 ml containers. It allows flexible applications and excellent effects on images and can be used for scrapbooking, mix media, crackle techniques, etc. These Powertex Bister Powder colors are earthy and natural and offer good coverage. Note: Powertex Bister Powder is water soluble. The recommended ratio is 200 ml of water per tablespoon of patina. Depending on how dark the result you want, a smaller or larger amount is used.