Popsugar Beauty Beauty News What Is Double Process? Literally Everything You Could Ever Want to Know About Double Process Hair Dye January 6, 2018 by Alaina Demopoulos First Published: October 5, 2017 View On One Page Photo 17 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 17 Now comes the acid wash. Jeanise artfully swiped rings of white around my head. I like to think it looked like a halo, because I'm such a hair angel now. Previous Next Start Slideshow Beauty NewsBeauty TrendsBeauty How-ToHairHair TrendsHair Color