D.C. Mun. Regs. tit. 25, r. 25-G300
Operators shall ensure only distilled water is used to mix and dilute inks, or pigments and shall not use tap water.
Operators shall ensure tattoo artists use inks, and pigments that are specifically manufactured for performing body art procedures in accordance with manufacturer's instructions.
Operators shall ensure tattoo artists transfer the quantity of ink and pigment to be used in the body art procedure from the ink and pigment bottle and place it into a single- use paper or plastic cup or cap immediately before a tattoo is applied and discarded immediately upon completion of a tattoo.
Single-use, disposable items, including but not limited to cups, cotton swabs, corks, rubber bands, and toothpicks shall be maintained in clean condition and dispensed in a manner to prevent contamination to unused single- use disposable items.
Single-use plastic covers shall be used to cover spray bottles or other reusable accessories and discarded immediately upon completion of the procedure.
Inks, pigments, soaps, and other products in multiple-use containers shall be dispensed in a manner that prevents contamination of the storage container and the remaining unused portion through the use of a single- use receptacle.
If a tray is used for inks or pigments, it shall be decontaminated after use on each customer.
D.C. Mun. Regs. tit. 25, r. 25-G300