The reverse side of the backing paper of an adhesive tattoo is used as a print area for additional information.
There you will usually find the instructions for applying and removing tattoos, storage instructions, hazard warnings, and the manufacturer, seller, and ingredients.
Tip: you can also use the back print as advertising space and have a logo, contact information, or information on competitions etc. printed in 1C or 4C. Another variant of the back print is the single-colour preview of the tattoo.