Why perm (permanent wave) give hair, The blocking base is the hair you have sectioned off for wrapping on the perm rod. this causes the hair to start the curl right from the scalp which creates ‘clash. Review curlformers natural hair 4b & 4c, I like the video and very helpful! i was nayural till i put the cold wave in my hair and had been natural for 10 years. i did not know of these hair care videos till. Hair - wikipedia, free encyclopedia, All natural hair colors are the result of two types of hair pigment. both of these pigments are melanin types, produced inside the hair follicle and packed into.