Brand from South Korea: no: hj. Takes care of skin texture and wrinkles. Applied the idea of sparkling water, there will be bubbles after you put on the mask that helps remove dead skin cells and blackhead. How to use: 1. After washing your face, place the sheet on your face. 2. Remove the mask sheet after bubbles come out which takes around 5-10 minutes. 3. Then, massage gently with the bubbles.