Interesting!!
I didn't know what a digital perm was so I wikipedia'ed it!
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What is digital perm
A digital perm is a perm which uses hot rods with the temperature regulated by a machine, which has a digital display, hence the name. However, the process of the perm is quite analogue. The name “Digital Perm†is also copyrighted by a Japanese company, PAIMORE Co.,Ltd.<http://www.paimore.com/>. Hair stylists usually call it a “hot permâ€, but it is commonly known as a “digital permâ€.
A normal perm basically requires only the perm solution. A digital perm requires a (different) solution plus heat.
This type of perm was developed in South Korea, and now popular in both South Korea and Japan.
Difference between a normal perm and a digital perm
The biggest difference between other perms and a digital perm is the shape and the texture of the wave.
A normal perm, or a “cold permâ€, makes the wave most prominent when the hair is wet, and loose when it is dry. The hair tends to look moist and as locks.
A digital perm makes the wave most prominent when the hair is dry, and loose when it is wet. Therefore you can create the dry and curly look of the curl iron or the hot curler. The digital perm requires heat, so it is also called a “hot perm†in comparison to the “cold permâ€.