Say you're at the salon looking over the color treatment service menu, and you get a little puzzled. Should you have the single process color, or should you go for the double? Well, one thing's for sure: single process will probably take a little less time and save you a few pennies.
Single Process means that a new color or toner is applied all over to create a new base color. The hair is lifted and deposited in one easy step. It's the most common out of the two, and it's wonderful for covering grays and adding shininess to dull hair. Plus, it's also great for the home hair colorist.
Double Process is typically used when lightening hair by more than two shades. First the hair is bleached to remove natural or colored hair pigments, and then pigment is added into the hair to create the desired shade. To avoid hair drama, leave this one to the pros.