Black tattoo ink is the most sought-after and popular ink among all the colors and shades. All tattoo inks are classified depending on the destination and type of work. For creating a clear contours and shading pattern parts you need to use completely different types of black ink .It is very important to choose the ink depending on the result that you want to get. The inks for shading usually contain smaller powder while inks for lining are sort of "cobblestones" that densely sit in the skin. If you use a shading ink for the outlines, the pigment can overcome the intercellular spaces in the skin and pass through the fat layers so the contour of tattoo can blur. Tattoos, though extremely popular, have not historically been heavily regulated. As a result, some tattoo inks have contained harmful and even toxic ingredients, ranging from metallic salts and lead to plastics, formaldehyde and a range of other chemicals.

Modern tattoo ink designers are concerned with making products that are socially acceptable—inks that are organic, vegan-friendly, and non-toxic - that minimize health risks by being sterilized and tested for a broad spectrum of bacteria before being released. That doesn't mean that all tattoo ink is safe, though. Black ink has traditionally been made of iron. Nontoxic versions include carbon and logwood for black ink. Today, many tattoo artists recognize the importance of using nontoxic inks in their work. You have to buy your tattoo ink from the reputable wholesaler to ensure that you receive quality products.