Digital Perm-is a perm that uses hot rods with the temperature regulated by a machine with a digital display. The process is otherwise similar to that of a traditional perm.
A normal perm basically requires only the perm solution. A digital perm requires a solution plus heat. This type of perm is popular in several countries.
The biggest difference between other perms and a digital perm is the shape and the texture of the wave created by the digital process. A normal perm or cold perm makes the wave most prominent when the hair is wet and loose when it is dry.
Digital perm thermally recondition the hair, through the chemicals and processing are similar for a straight perm. The hair often feels softer, smooth and shinier after a digital perm.