BJB liquid pigments are designed to rapidly disperse into the systems described above. Th e 6800 pigment series is typically used by adding approximately 1/2% by weight of pigment to the material system. Many materials are naturally dark and hard to color. Th ese materials may require from 1% to 5% of the pigment dispersion to develop the desired color. Liquid pigments can often cause a negative eff ect on a material’s physical properties if too much pigment is added.