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 20 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 20 . . . Of acid wash hair! Eight hours later, my dreams of '80s rocker hair came true. Previous Next Start Slideshow Beauty NewsBeauty TrendsBeauty How-ToHairHair TrendsHair Color