Bishop Greywash series , cooperativly made by black and grey master Jack rudy with 37-years tattoo experience and Bishop Rotary INC, which can completely resolve the troubles on toning . The color levels are formulated in strict and best ways , which resolve the problems: uneven color, obvious color level, unsoft color, and inconsistent color. This ink is anitary and safe,There are tonly 3 ingredients : organic pigments , ethyl alcohol, sterile water,It is more fluent and easier to mixed with other brands inks because of there is no chemical solvent.