add sufficient sulphuric acid to give the mixture a slightly acidulous taste, and then add carmine of indigo according to the shade of green desired. To dia silk a little alum should be added ...

Ancient Greeks favored gold and red-gold shades ... or sulfuric acid to lighten it. It wasn’t until the early 20th century that hair dye as we know it – chemical, in a rainbow of colors ...

Acid dyes enjoy widespread applications in the making of color silk, wool, feathers, other protein fibers and nylons. To meet the ever-growing demand of the textile industry for this type of chemicals ...

The treated PP supports were dyed using disperse, acid and reactive dyes. Standard tests of wash fastness (shade change and staining) were conducted and showed that all dyes were fixed ...

Ancient Greeks favored gold and red-gold shades ... or sulfuric acid to lighten it. It wasn’t until the early 20th century that hair dye as we know it – chemical, in a rainbow of colors ...