Once popularized by cartoon characters, tattoos are everywhere now. Just look at the reality show “Miami Ink,” magazine advertisements for Calvin Klein, or celebrities such as David Beckham, Johnny Depp, and Katy Perry. Have you also noticed inked torsos during basketball and football seasons? The Pew Research Center reports that 38% of young adults ages 18 to 29 have tattoos.
How are tattoos made?
Needles puncture through two layers of skin, injecting droplets of ink. Jabs are repeated close together, forming a pattern. Since the ink is inserted deeply into the second layer of skin, it remains stable, so the tattoo is essentially permanent.
If you decide to ink, do it safely by seeing an expert. Ask if the tattoo artists are licensed, wear gloves, and sterilize their instruments. Since a new tattoo is a wound, treat it like one. Infection and diseases are potential problems.
What’s in the ink?
Most tattoo inks are pigments suspended in a carrier solution that keeps the color pigments evenly distributed for smooth application. Salts of heavy metals are usually the source of color for the inks (Table 1). The heavy metals mercury, lead, and cadmium are known to cause brain damage, birth defects, and other serious medical problems.
When ink is carefully and safely deposited in the skin, it usually does not cause a problem, but if the body has an allergic reaction to the ink or carrier, chemical changes can occur that lead to an itchy rash or small bumps.