Color is more unlikely to "bleed": With balayage, colorists use a barrier among their sections to avoid the layers of bleach from touching. "The advantage of working with cotton or saran wrap between sections is to forestall the lightener from bleeding, which could create a blotchy dye job," Cassanova suggests. https://zanderdatog.nico-wiki.com/1079846/getting_my_foilyage_hair_vs_highlights_to_work