In order to overcome the disadvantage of low rubfastness of conventional pigment dyeing , a new type covering pigment with ultramicro azo dye as core and acrylate adhesive as shell was presented.
A water-reducible, opaque, matte-finish paint in which an albuminous or colloidal medium (as egg yolk) is employed as a vehicle instead of oil or varnish.
Organic colors related to carcinogenic aromatic amine, especially the important intermediate 3,3' dichloroaniline of organic color are discussed in details.
If you're looking at the work of art and you want to understand what is original and what's a restoration, you will take a tiny supple of pigment and analyze it.