Purpose: Patch testing is generally done to see whether a particular substance is causing allergic skin inflammation (contact dermatitis). It can also detect delayed allergic reactions, which can take several days to develop.
This test is completed with a survey of 30 individuals.
Usually done for leave on products and is needed for a product to claim that it is dermatologically tested.
Lead time of testing is around 4 weeks
Testing sample needed is around 300g