The phrase "acid dyes" refers to a type of dye that is used to color or stain certain materials, like textile fabrics or yarns. These dyes work well in an acidic environment and can produce bright and vibrant colors. Full definition
Leonor also hand dyes yarn and fiber using professional grade acid dyes, spins on her wheel and knits. (blog.feedspot.com)
Without knowing exactly which acid dyes are in the ties you will be using, it is best to practice caution and avoid breathing in potentially dangerous dye fumes when heating the ties in hot water. (scientificamerican.com)
Conglomerations of colors and holes on wool are rendered scarred through traces of corrosives like acid dyes, ash and stains. (miandn.com)