To the Editor.—
In Danish prisons, tattoo colors and instruments are forbidden. However, some prisoners constructed tattooing instruments by mounting steel needles on electric shavers. Owing to the lack of standard pigments, the prisoners improvised, viz, they used a paint that is used for posters, for hobby crafts and for decoration.The poster paint is available in scarlet and dark green, and is used for hobby work in the prison. The scarlet paint contains color index (CI) pigments 3, 4, and 95, all of which are monoazopigments, whereas the dark green paint contains CI yellow 1, which is a monoazopigment, CI 7, and CI blue 15, both of which are phthalocyanine pigments. Both poster paints contain chalk, dolomite, and casein as binders, and the preservative 0.4% chlormetacresol.In 1973, seven prisoners were referred to the Department of Dermatology, Odense University Hospital, Odense, Denmark, for treatment of ulcerating, itching skin tumors
Schmidt H, Christensen HE. Red Poster Paint Tattoo Granuloma. Arch Dermatol. 1978;114(6):965–966. doi:10.1001/archderm.1978.01640180095037
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