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.
Never apply color before getting a perm, as the chemicals often strip or pull color from the hair shaft, resulting in dull, faded hair. Always plan to color hair after getting a perm in order to revive the color and correct any color changes that occur as a result of the perm.