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.
Visions of frizzled, fried and falling-out hair may plague your nightmares if you're planning on getting your hair permed and colored in the same day -- regardless of whether your perm is a permanent curl set or permanent relaxer style.