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.
You can get perms that just add body to fine, limp hair, you can get loose, sexy waves or you can go for the corkscrew curls that many straight-haired girls covet (and some curly-all-their-lives girls are sick of).