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.
How long after a perm can you wash your hair? A person should wait 24 to 48 hours after receiving a permanent hair treatment before washing her hair. If water is applied sooner than 24 hours after the perm, the chemicals can neutralize, and the hair can lose the curl. To achieve the best results, wait 48 hours.