Incorporation in Lipid Microparticles of Acid Red 87, a Colorant Used in Tattoo Inks: Effect on Photodegradation Under Simulated Sunlight and Laser Radiation

Safety of Inks Used in Tattoos

Since 2015, the number of articles on tattoo inks has increased significantly in recent years as more and more people choose to decorate their bodies. The introductory section presents a multifaceted psychological and social perspective. Attitudes toward tattoos in different parts of the world are taken into account, as well as the approach to the topic by different social groups. It has changed over the years and depending on the wealth of a given group. The main part is an overview of tattoo ink tests, which mainly focus on the safety of the products used, direct tests and potential allergens contained in the composition. The information contained can be summed up by the great need for ongoing implementation of further regulations in order to protect people using the services of tattooists.

Accelerated aging modulates the toxicological properties of the diazo tattoo pigment PO13

Pigment particles used in tattooing may exert long terms effect by releasing diffusible degradation products. In the present work, aqueous suspensions of the organic orange diazo pigment PO13 were aged by exposure to simulated sunlight at 40 °C. The morphology and the surface charge of PO13 particles were barely modified upon aging, but primary particles were released by de-agglomeration. Soluble photoproducts were detected in the liquid fractions. One of this photoproduct (DCBP) was produced in large amount in suspension in isopropanol and purified. The toxicological profiles of aged suspensions, their soluble fractions and DCBP were then determined on the keratinocyte cell line HaCaT. Impact of suspensions of PO13 on viability was hardly affected by aging. In contrast, the soluble fractions were more toxic after photo-aging. Suspensions and filtrates induced neither release of reactive oxygen species nor formation of DNA strand breaks. The samples exhibited only limited effects on the proteome of HaCaT cells. Conversely, DCBP was cytotoxic and induced the production of ROS, but was not genotoxic. DCBP was found to activate CYP450 monooxygenases known to be involved in the metabolism of xenobiotics. Altogether, our results show that aging of PO13 leads to the release of toxic soluble compounds.