Principle of Derma RollerThe Microneedles of Derma Roller penetrate the epidermis and dermis layer of skin. The needles will generate micro channels into the skin. This gives a pathway for skin products to penetrate more easily, boosting their effectiveness greatly. These channels should close up within an hour. ApplicationCountless micro transcellular routes induce wound healing results in acceleration of natural collagen induction in the dermal and basal layers. Transdermal drug delivery system; Guide in skin nutrition; extract and functional cosmetics. Making an active ingredient absorption route in the epidermis due to the needles penetration into the corneum. This derma roller creates channels deep into the dermis of skin, which is the main obstruction to penetration of active ingredients. The active ingredients in the skincare products can reach into the depths of the skin more effectively than by simply applying the products topically.