Manufacturers usually don’t reveal their ingredients and recipes. Commonly Professional tattoo inks are made from iron oxides (rust), metal salts, plastics. Homemade or traditional tattoo inks are made from pen ink, soot, dirt, blood, or other ingredients. Heavy metals used for colours include mercury (red); lead (yellow, green, white); cadmium (red, orange, yellow); nickel (black); zinc (yellow, white); chromium (green);… Read more →