The short reply to the inquiry is: You can't be 100% sure! Producers of inks and colors are not needed to uncover the substance. An expert who blends his or her own inks from dry colors will be unavoidably set to know the sythesis of the inks. Notwithstanding, the data is exclusive (exchange insider facts), so you could possibly get replies to inquiries.
Most tattoo inks actually aren't inks. They are made out of shades that are suspended in a bearer result. In spite of prominent conviction, shades normally are not vegetable colors. Today's colors principally are metal salts. On the other hand, a few shades are plastics and there are presumably some vegetable colors as well. The color gives the shade of the tattoo. The motivation behind the bearer is to sterilize the color suspension, keep it equitably blended, and accommodate simplicity of requisition.