This is contact dermatitis, a form of type iv hypersensitivity in which pre-sensitized lymphocytes led to this inflammatory reaction a couple of days after contact with the offending plant material.
图示接触性皮炎，由致敏淋巴细胞引起的IV型超敏反应，在接触致敏性物质几天后出现。
2
The red sensitized gelatin recording materials with high imaging speed and photosensitivity are obtained by optimizing material recipe and post processing procedures.