Black henna
A tattoo ink and paste consisting of henna with other ingredients added, sometimes including para-phenylenediamine (PPD).
Allergic reactions to PPD include a red rash, contact dermatitis, itching, blisters, open sores, scarring of the skin and other potentially harmful effects.
Allergic reactions to PPD may also lead to sensitivity to other products such as hair dye, sun block and some types of black clothing.
Also called blue henna