Tattoo Ink Chemistry

Have you ever wondered what ingredients are used to make tattoo ink? The short answer to the question is: You cant be 100% certain. Manufacturers of inks and pigments are not required to reveal the contents. A professional who mixes their own inks  from dry pigments will be most likely to know the composition of the inks. However, the information is proprietary—a trade secret—so you may or may not get answers to questions. Most Not Ink Most tattoo inks technically arent inks. They are composed of pigments that are suspended in a carrier solution. Contrary to popular belief, pigments usually are not vegetable dyes. Todays pigments primarily are metal salts. However, some pigments are plastics and there are probably some vegetable dyes, too. The pigment provides the color of the tattoo. The purpose of the carrier is to disinfect the pigment suspension, keep it evenly mixed, and provide for ease of application.  Ã‚   Toxicity This article is concerned primarily with the composition of the pigment and carrier molecules. However, there are important health risks associated with tattooing, both from the inherent toxicity of some of the substances involved and unhygienic practices. To learn more about the risks associated with a particular tattoo ink, check out the Material Safety Data Sheet (MSDS) for any pigment or carrier. The MSDS wont be able to identify all chemical reactions or risks associated with chemical interactions within the ink or the skin, but it will give some basic information about each component of the ink. Pigments and tattoo inks are not regulated by the U.S. Food and Drug Administration (FDA.) However, the FDA is examining tattoo inks to determine the chemical composition of the inks, learn how they react and break down in the body, how light and magnetism react with inks, and whether there are short- and long-term health hazards associated with ink formulations or methods of applying the tattoos. Other Issues The oldest pigments used in tattoos came from using ground up minerals and carbon black. Todays pigments include the original mineral pigments, modern industrial organic pigments, a few vegetable-based pigments, and some plastic-based pigments. Allergic reactions, scarring, phototoxic reactions (i.e., a reaction from exposure to light, especially sunlight), and other adverse effects are possible with many pigments. The plastic-based pigments are very intensely colored, but many people have reported reactions to them. There are also pigments that glow in the dark or in response to black (ultraviolet) light. These pigments are notoriously risky. Some may be safe, but others are radioactive or otherwise toxic. Heres a table listing the colors of common pigments used in tattoo inks. It isnt exhaustive.   Pretty much anything that can be used as a pigment has been at some time. Also, many inks mix one or more pigment:   Composition of Tattoo Pigments Color Materials Comment Black Iron Oxide (Fe3O4)Iron Oxide (FeO)CarbonLogwood Natural black pigment is made from magnetite crystals, powdered jet, wustite, bone black, and amorphous carbon from combustion (soot). Black pigment is commonly made into India ink.Logwood is a heartwood extract from Haematoxylon campechisnum, found in Central America and the West Indies. Brown Ochre Ochre is composed of iron (ferric) oxides mixed with clay. Raw ochre is yellowish. When dehydrated through heating, ochre changes to a reddish color. Red Cinnabar (HgS)Cadmium Red (CdSe)Iron Oxide (Fe2O3)Naphthol-AS pigment Iron oxide is also known as common rust. Cinnabar and cadmium pigments are highly toxic. Naphthol reds are synthesized from Naptha. Fewer reactions have been reported with naphthol red than the other pigments, but all reds carry risks of allergic or other reactions. Orange disazodiarylide and/or disazopyrazolonecadmium seleno-sulfide The organics are formed from the condensation of 2 monoazo pigment molecules. They are large molecules with good thermal stability and colorfastness. Flesh Ochres (iron oxides mixed with clay) Yellow Cadmium Yellow (CdS, CdZnS)OchresCurcuma YellowChrome Yellow (PbCrO4, often mixed with PbS)disazodiarylide Curcuma is derived from plants of the ginger family; aka turmeric or curcumin. Reactions are commonly associated with yellow pigments, in part because more pigment is needed to achieve a bright color. Green Chromium Oxide (Cr2O3), called Casalis Green or Anadomis GreenMalachite [Cu2(CO3)(OH)2]Ferrocyanides and FerricyanidesLead chromateMonoazo pigmentCu/Al phthalocyanineCu phthalocyanine The greens often include admixtures, such as potassium ferrocyanide (yellow or red) and ferric ferrocyanide (Prussian Blue) Blue Azure BlueCobalt BlueCu-phthalocyanine Blue pigments from minerals include copper (II) carbonate (azurite), sodium aluminum silicate (lapis lazuli), calcium copper silicate (Egyptian Blue), other cobalt aluminum oxides and chromium oxides. The safest blues and greens are copper salts, such as copper phthalocyanine. Copper phthalocyanine pigments have FDA approval for use in infant furniture and toys and contact lenses. The copper-based pigments are considerably safer or more stable than cobalt or ultramarine pigments. Violet Manganese Violet (manganese ammonium pyrophosphate)Various aluminum saltsQuinacridoneDioxazine/carbazole Some of the purples, especially the bright magentas, are photoreactive and lose their color after prolonged exposure to light. Dioxazine and carbazole result in the most stable purple pigments. White Lead White (Lead Carbonate)Titanium dioxide (TiO2)Barium Sulfate (BaSO4) Zinc Oxide Some white pigments are derived from anatase or rutile. White pigment may be used alone or to dilute the intensity of other pigments. Titanium oxides are one of the least reactive white pigments.