Which of the following inks should a tattoo artist avoid using?

A tattoo artist should avoid using inks with unknown chemical compositions because these inks can pose serious health risks to clients. Inks that lack proper labeling or transparency about their ingredients may contain harmful substances or contaminants that could lead to allergic reactions, infections, or other health complications.

The safety and quality of the materials used in tattoos are paramount. Professionals are trained to ensure that the inks they use are specifically formulated for tattooing and have been tested for safety. Inks that are clearly labeled for skin use have been evaluated for their suitability and safety for topical application, thereby reducing the risk of adverse reactions.

In contrast, inks approved by health departments or those specifically labeled for skin use are regulated and deemed safe for tattoo application. Consequently, using inks with known and regulated compositions is essential for maintaining client safety and delivering high-quality tattoo work.