Fig. 2. (a,b) A positive reaction to the cosmetic lotion was observed. The photo-patch test produced the same erythema as the patch test, indicating a negative result (Day 2). (c) Additional patch-testing revealed a positive reaction to 3-o-ethyl-ascorbic acid 1% aq. (Day 3).Letter to the Editor / Allergology International 64 (2015) 194e195