Inducing Redness Clinical Study

Subjects use 3 drops about 0.2g of 50% Glycolic Acid product on half face under instruction, then wait for 3 minutes and wash face by tap water. Wait for 10 minutes before measuring.

Technician use the D100 to paste on the center of the test area and make it fit the skin more completely and evenly by pump fully cover the D100 patch for 10 seconds. Stripping on each test area until the skin change into redness. The number of stripping will be recorded.