Without color; lacking characteristics which give variety. blank (Adjective). Free from writing, printing, or marks; having an empty space to be filled in; as, blank paper; a blank check; a blank ballot. blank (Adjective). Without expression.
Yes they do damage hair. Every time I have tried one ,I wound up looking like a Q-tip or my head looked like cotton. A perm will damage even more and look worse if you have been coloring your hair. There's chance of it looking okay if you don't color your hair.
Quick Answer. After a perm, it is advisable to wait at least 48 hours before shampooing the hair. Permed hair is fragile after undergoing this chemical process, and waiting to wash the hair gives it a chance to adjust. It is best to use shampoo and conditioner designed for chemically treated hair.