What is a Single Patch Test for cosmetic products?
Singple Patch Test is a method to discover if there are any specific substances such as alcohol, perfume, sulphate used in cosmetic products are too much and causing allergic inflammation on a patient’s skin or not. The test is conducted on healthy volunteering subjects by using the patch test kits. The skin reactions such as redness and swelling are assessed by planting the patch kits on the subject’s back up to 48 hours. Then, the result is determined by highly trained dermatologists after the patch removal.
The patch test is done through a series of appointments. The first appointment could take up to 30 minutes where the patches are planted on the back. The patches stay on the back on the subject for two days (48 hours). After two days, the subject will have another appointment, and the patches are removed. The last appointment will take place two days later after the patches are removed.