Kuro Sumi tattoo ink is crafted in Japan by experts who take special care to ensure that their product is of the finest quality. Formulas are closely guarded to protect the integrity of the ink. The diverse Kuro Sumi product line features 59 color choices, giving artists vast selection of the Japanese inks. New colors are developed to meet industry needs, but the same traditional quality is maintained in every product. Very fine pigment particles are used so that more pigment can be added to the ink so it's brighter and more vibrant through the years. High standards of craftsmanship are maintained so that every bottle contains tattoo ink produced in a clean environment.