Report of a Case A white man, aged 20, was employed as a helper on a two-color press. The dermatitis affected the nose, especially the external nares, the adjacent upper lip, base and V of the neck, and forearms. The duration was one month with episodes of being better and worse. Eliminative procedures led to gradual involution of the acute manifestations with no loss of time. A two-week vacation period was about to begin, so this time was put to use in determining the etiology. He returned to work with a normal skin. A few days later a recurrence developed. Three agents Para-tertiary butyl catechol (PTBC) recently gained attention as the cause of contact dermatitis from Thermo-Fax paper1-9 processed before 1958. This report describes the occurrence of allergic eczematous dermatitis from this chemical in a lithographer. were the only contactants; gas, roller wash, and type wash. While procedures were