Technica Defense Gel - Protective Anti Mark Gel 150ml It creates a non-occlusive barrier on the skin and protects it from any dye residue. TECHNICA is a line specifically designed for dyed / coloured hair It feels fresh on the skin and prevents unsightly stains. It has a pleasant, delicate green flower perfume Before dyeing, a layer of at least 1mm should be spread over the face contours around the hairline. It can be removed with shampoo