Skin art is a form of body modification that involves the application of permanent or semi-permanent ink to the skin. The two crossword solutions for the term 'skin art' are 'TATTOO' (6 letters) and 'tattoos' (7 letters). Tattoos are created by inserting ink into the dermis layer of the skin, which is the second layer of the skin. This ink is then absorbed by the body, creating a permanent design. Tattoos can be used to express personal beliefs, commemorate special occasions, or simply as a form of self-expression.