A kind of simple and easy test method is, the daub on the skin of preexistence elbow inside a few face film, after 20 minutes if do not have allergic reaction, criterion but apply is on the face.

• 一种简易的测试方法是，先在手肘内侧的皮肤上涂抹少量面膜，20分钟后若无过敏反应，则可敷在脸上。