The color "The single process color I'm using will give Wendy a richer color," says Petroff. "And it's really low-maintenance -- it'll grow out very well." Petroff also wants Wendy's color to be softer. "Single process color is great for this, because some of Wendy's old highlights will come through. Overall, this is going to help Wendy's hair color look a little more natural."
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