Tattoo ink consists of two main components: pigments that provide color and a carrier solution that delivers pigment into your skin. The pigment and the carrier arrive premixed in a bottle that a manufacturer formulates and an artist only chooses, and laboratory testing keeps finding ingredients in those bottles that never made it onto the label.
Ingredients break into three parts, the pigments that carry the color, the carrier that moves them into the skin, and the additives that sit alongside both. Production runs in four industrial stages, from grinding raw pigment into powder to sterilizing the liquid before it is bottled. Safety turns on three documented risks, on how the shop handles the bottle, and on the fact that the FDA does not approve any of it before it goes on sale.
The sections below trace where those raw materials came from, whether any of them are animal-derived, what current research says about cancer and MRI scans, and how to find out what is in the bottle in front of you.
What Tattoo Ink Is Made Of
Tattoo ink is made of two things that go separate ways under your skin, a solid pigment that stays locked in the dermis for life and a carrier solution that the skin absorbs and clears.
A tattoo needle drives that mixture into the dermis, roughly 1.5 to 2.0 millimeters below the surface of your skin. Any shallower and the ink sits in the epidermis, the layer your body sheds, so the color lifts away with it. Any deeper and the ink spreads sideways as it settles, and the lines you paid for go soft.
Cells in the dermis, including fibroblasts and the specialized macrophages called melanophages, trap the pigment particles and hold them in place, and that entrapment is what makes the image permanent.
The carrier solution does the opposite job, carrying pigment through the needle into the dermis and then being absorbed by the skin, which is part of why a fresh tattoo looks different once the swelling settles. How your skin closes over the pigment left behind is the whole of the tattoo healing process.
The parts of a tattoo ink bottle are listed below.
| Part | What it does | Where it ends up |
| Pigment | Carries the color you see | Stays in the dermis for life |
| Carrier solution | Moves pigment through the needle and holds it evenly mixed | Absorbed by the skin and gone |
The pigment half is where the color lives, and it is not one material but a set of them.
What Pigments Give Tattoo Ink Its Color?
Pigments give tattoo ink its color, and every shade on an artist’s station traces back to one of six pigment groups running from black at one end to yellow and orange at the other.
Tattoo pigments are fine, powdered colorants that stay visible because they never dissolve. Those colorants fall into two families, molecular compounds (dyes) and solid compounds (particulate solids), and both sit in the dermis as particles rather than as a stain.
Which groups an artist reaches for depends on the style you book. Black and gray work runs almost entirely on carbon black thinned down into greywash, color realism leans on the red and yellow groups, and white does most of its work in highlights and in covering old ink during a cover-up.
The pigment groups used in tattoo ink are listed below.
- Black: Carbon black from soot and iron oxide are the pigments behind black, the workhorse of every grayscale and lining job.
- White: Titanium dioxide and zinc oxide are the pigments behind white, and titanium dioxide doubles as a lightening agent, which makes it one of the most common ingredients across inks of every color.
- Red: Iron oxide, cadmium, naphthol, and quinacridone are the pigments behind red, and red is the color most often linked with delayed skin reactions.
- Green: Chromium oxide, copper compounds such as phthalocyanine green, and mixes including lead chromate are the pigments behind green.
- Blue: Cobalt and copper-based compounds such as copper phthalocyanine, along with nickel-based pigments, are the pigments behind blue, and the violets beside it come from manganese violet and dioxazine compounds such as Pigment Violet 23.
- Yellow and Orange: Cadmium sulfide and azo dyes such as Pigment Yellow 74, disazodiarylide, and disazopyrazolone are the pigments behind yellow and orange, and cadmium sulfide is light-sensitive enough to fade with sun exposure.
What Heavy Metals Are Found in Tattoo Inks?
The heavy metals found behind tattoo ink colors are cadmium, chromium, cobalt, nickel, and mercury.
Cadmium sulfide and selenide produce bright yellows, oranges, and reds. Chromium oxide produces rich greens. Cobalt aluminum oxide generates the blues and purples. Nickel-based pigments appear in some blue formulations, and mercury sulfide, sold historically as cinnabar or vermilion, belongs mostly to older recipes.
These are the ingredients regulators watch most closely, and the ones behind most reported ink allergies, which is why the colors that carry them get their own note in the safety section below.
UV and Blacklight Tattoo Inks
UV and blacklight tattoo inks are made of phosphorescent or UV-reactive compounds suspended in a carrier solution, so they stay invisible in normal light and fluoresce brightly under ultraviolet light.
Some UV pigments contain plastics or proprietary chemicals that the manufacturer does not identify. Long-term studies on these novel pigments are thin, and their biocompatibility requires more research.
What Is in the Carrier Solution?
The carrier solution in tattoo ink is built from four ingredients: water, alcohols, glycerin or propylene glycol, and witch hazel.
The carrier is the liquid the pigment sits in, and it makes pigment more soluble, controls ink viscosity, and ensures even pigment transport to your dermis layer.
The ingredients in a tattoo ink carrier solution are listed below.
- Water: Purified water forms the base liquid of the carrier, and every one of the 54 commercial inks in a 2024 US market survey was built on water with ethanol, isopropyl alcohol, or both.
- Alcohols: Ethyl alcohol serves as an antiseptic, isopropyl alcohol provides sterilization and increases skin permeability, methanol is less common because of safety concerns, and benzyl alcohol turned up in 15 of the 54 inks surveyed.
- Glycerin or Propylene Glycol: Glycerin acts as a humectant that moisturizes skin and improves how readily the ink dissolves, and propylene glycol does the same double duty as humectant and solvent.
- Witch Hazel: Witch hazel acts as an astringent that reduces inflammation and bleeding while the artist works.
What Additives Are in Tattoo Ink?
Tattoo ink additives decide how the liquid behaves in the bottle and through the needle, and they fall into five groups: preservatives, binding agents, stabilizers and thickeners, wetting agents, and unlisted adulterants.
The additives found in tattoo ink are listed below.
- Preservatives: Preservatives prevent bacterial and microbial growth once a bottle is opened, and the list runs from benzoic acid, denatured alcohols, and parabens through to formaldehyde, which is restricted as a known carcinogen.
- Binding agents: Binding agents keep color particles evenly mixed so they do not separate out of the carrier.
- Stabilizers and thickeners: Stabilizers and thickeners adjust the texture and flow of the liquid so one pass lays down like the next.
- Wetting agents: Wetting agents lower the surface tension of the carrier so the ink moves smoothly through the needle instead of skipping.
- Unlisted adulterants: A 2024 analysis found unlisted additives or pigments in 45 of 54 commercial inks, with polyethylene glycol in 28 bottles, propylene glycol in 15, higher alkanes in seven, and BHT alongside them.
Those ingredients reach the bottle inside a factory, long before any of them reach a tattoo shop.
How Tattoo Ink Is Made
Tattoo ink is made in four industrial stages that begin with grinding raw pigment into a fine powder and end with filtering and sterilizing the liquid before it is sealed into bottles.
The stages of tattoo ink manufacturing are listed below.
Grinding breaks raw pigment material down into a fine, even powder. How fine that powder is decides how cleanly the color reads once the ink is under skin.
Blending works that powder slowly into the carrier solution, because a uniform mixture is what keeps one bottle of a color matching the next.
Homogenization breaks up the clumps blending leaves behind, spreading the particles evenly so the ink flows smoothly through a needle instead of dragging.
Filtration and Sterilization close the run, straining out large debris and then clearing pathogens with autoclaving and filtration before the ink is bottled. Bottles leave the plant labeled with the color, the batch number, and an expiration date. Tattoo ink expires and goes bad. Once a bottle is past its expiration date, sterility is no longer assured, and pigments degrade and components separate over time, affecting ink quality and consistency.
At a station run properly, the artist pours only what a piece needs into a single-use ink cap and throws out whatever is left when the session ends, because ink that has touched a working needle cannot go back into a bottle the next client will be tattooed from. Ink mixed at home never passes through filtration or sterilization, so nothing in that bottle has been cleared of pathogens at any point.
Manufacturing explains how the bottle gets filled, but not where any of those raw materials came from to begin with.
Where Tattoo Ink Comes From
Tattoo ink comes from raw earth minerals, heavy metals, carbon soot, and modern plastics, and before any of those it came from whatever a culture had within reach, from crushed plant leaves and ash to animal bile and burnt resin.
Most pigments were originally manufactured for industrial purposes like paints, textiles, and printer’s ink rather than for cosmetic tattoo use. The FDA still describes some of the colors used in tattoo ink as industrial grade, the kind made for automobile paint.
Modern tattooing shifted toward refined pigments and synthetic alternatives. Manufacturers chose them for color consistency and for staying put over the years.
Before any of that, soot created black ink and crushed minerals like ochre provided the earthy tones. Logwood and cinnabar were ground for pigment long before synthetics existed, and cultures without access to either worked with crushed plant leaves, ash, animal bile, or burnt resin, the raw sources shown in the diagram below.
Bone char, vegan certification, and the organic label are the three places that history still shows up on a modern bottle.
Is Tattoo Ink Made From Bones?
Some traditional and historical tattoo inks do contain bone char made from burned animal bones, but most modern black ink uses synthetic carbon instead.
Bone char was never the only animal-derived ingredient in an older formula. Glycerin was rendered from animal fat, gelatin came from hooves, and shellac came from the resin of lac bugs. Human ashes and human remains are a separate myth, and commercially manufactured tattoo ink does not use either.
Vegan Tattoo Inks
Vegan tattoo inks are formulas that replace every animal-derived ingredient, swapping bone char for synthetic carbon, animal-fat glycerin for the plant-based version, and shellac for synthetic substitutes.
Vegan applies to both halves of the bottle, so pigments and carrier solutions alike stay free of animal products. Manufacturers publish certification per product line, so an artist naming the brand and line is enough for you to check it yourself.
Organic Tattoo Inks
Organic tattoo inks are the most misread label on the shelf, because organic means two different things, carbon-based in chemistry (which covers most modern synthetic pigments) and plant-derived in marketing.
A bottle labeled organic can be entirely synthetic and still be accurate in the chemical sense. Truly natural inks stay uncommon for permanent tattoos because they are limited in color variety, vibrancy, and permanence next to synthetic alternatives.
Those same mineral and synthetic pigments behave differently once a needle puts them under the skin.
Is Tattoo Ink Safe?
Tattoo ink safety comes down to managing three known risks: infections, allergies, and pigment particles that migrate into the lymph nodes.
The documented safety risks of tattoo ink are listed below.
- Infections: Unsealed or contaminated ink can carry bacteria or mold into skin that a needle has already opened, which is why watching the seal come off the bottle counts for as much as taking care of a fresh tattoo does afterward.
- Allergies: Colored pigments, red, purple, and yellow most often, can set off localized itching, swelling, or a rash that appears months or even years after the tattoo is finished, and the American Contact Dermatitis Society named propylene glycol its Allergen of the Year in 2018 for reactions running from redness and swelling to fluid-filled blisters, though those reactions trace to specific colors and ingredients rather than to tattoos in general.
- Particle migration: Ink particles can travel through the lymphatic system and settle in lymph nodes, although direct harm from this remains unproven.
Regulation answers how those risks are policed, while research is still working out whether the ink itself does any longer-term harm.
Who Regulates Tattoo Ink?
Tattoo ink is overseen federally by the U.S. Food and Drug Administration as a cosmetic and color additive, but the FDA does not require pre-market safety approval, and shop inspections fall to state and local health departments instead.
The FDA treats tattoo ink as a cosmetic, so a manufacturer does not have to prove an ink is safe before selling it, and no color additive is actually approved for injection into the skin. The agency steps in only after the fact, with recalls or warnings once contamination or a serious reaction gets reported. A 2022 law expanded that power to order recalls and require ingredient labels to be kept current.
State and local health departments cover licensing, sanitation standards, and facility inspections. Minimum age is set the same way and is usually 18. Texas bans tattooing anyone under 18 under Health and Safety Code §146.012.
Can Tattoo Ink Cause Cancer?
No, current research has not established a direct link between tattoo ink and cancer in humans, though several pigment breakdown products are classed as compounds of concern.
Five of the pigments identified in the 2024 survey of the US market carry an azo group, and azo pigments can release primary aromatic amines, some of which are known or probable human carcinogens. The International Agency for Research on Cancer classifies carbon black and titanium dioxide as possible human carcinogens, and all nine manufacturers in that survey used both. Sunlight and laser light are what break these pigments down.
Do Tattoos Affect an MRI?
Yes, tattoos can affect an MRI, with reports of swelling or burning in the tattooed area and of pigment interfering with image quality, though the FDA describes these cases as rare and apparently without lasting effects.
Image interference has mainly been reported when someone with permanent eyeliner has an MRI of the eyes. Telling the technologist about your tattoos before the scan is what lets them account for both.
How to Find Out What Is in Your Artist’s Ink
You find out what is in your artist’s ink by asking four things before the needle comes out, the brand and product line, the seal and batch, the safety data sheet, and whether the line is certified vegan.
The label is not a full account of what is in the bottle, which is why the bottle itself is worth a look. You should ask your tattoo artist for information about the ink they use. Reputable artists name the brand and hand over the manufacturer’s safety data sheet, still printed on some products under its older name, the Material Safety Data Sheet.
The questions worth asking an artist about the ink they use are listed below.
- Brand and product line: Ask which brand and line the artist is using, since documentation is published per line rather than per color.
- Seal and batch: Ask to see the bottle opened in front of you, with the batch number and expiration date still legible on the label.
- Safety data sheet: Ask for the manufacturer’s safety data sheet, which reputable makers publish and an artist can usually pull up on request.
- Vegan or plant-based certification: Ask whether the line is certified if animal-derived ingredients matter to you, since bone char and animal-fat glycerin are settled at the raw-material stage and never appear on a color chart.
All four answers sit on the bottle or in a document the manufacturer already publishes, which is why a licensed shop can produce them at the counter, at tattoo parlors in San Antonio as anywhere else you book. Ink is one variable of several, and the guide to what a tattoo is covers the needle depth and healing that decide how a finished piece looks.
Sources
- Moseman, K., Ahmed, A., Ruhren, A., Swierk, J. R. What’s in my ink: an analysis of commercial tattoo ink on the US market. *Analytical Chemistry*, 2024, 96(9), 3906–3913. doi:10.1021/acs.analchem.3c05687
- U.S. Food and Drug Administration. Tattoos & Permanent Makeup: Fact Sheet.
- Texas Health and Safety Code, Chapter 146, Tattooing and Body Piercing §146.012.
