Tattoos are made of ink that resides under the skin; tattoos don't get old because of the placement of the pigments between the derma and the epidermis.
Tattoos are made with a dermograph, a tool that vibrates on needles filled with ink colors, these needles puncture the skin at a dept of 1 to 2 millimeter. The puncture skin can get infected if a lack of hygiene is present. Tattoos parlors must maintain a high standard of hygiene, all tools must be sterilized, the working hands must be also well cleaned with antiseptic substances, and the shop must be disinfected every day. Every shop must possess an autoclave, autoclave sterilizes materials with pressurized steam at an extremely high temperatures. All needles are new and disposed of after use.