... 2. Mix hair dye cream with hair developer cream at the proportion of 1:1 evenly, then apply ... the hair, keep it about 20 to 30 minutes at normal temperature, shorten time when heating hair3. Rinse hair with ... skin test. Take a little bit of agent 1 at the back of ear. If without allergic phenomenon ... product, can be used in barber, in salon, at home Port: usually Wu Chong/Guangzhou Remarks: Port can ...