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.
The regular use of dyes, bleaches, curl relaxers and perms can lead to hair breakage. The harsh chemical agents such as peroxide and hydroxide ions that are contained in these products can be very hard on your hair. The AAD recommends they be used sparingly to preserve your locks.