This article was originally published with the title “Pyrogallol for Dry-Plate Development” inSA Supplements Vol. 11 No. 270supp(March 1881), p. 4301doi:10.1038/scientificamerican03051881 ...

No patients reacted to pyrogallol or p-phenylenediamine in lanolin. Importantly, all three of these antioxidants are known contact allergens.