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Can be applied to tooled or untooled leather, either for even coloration or to highlight certain areas. For example, application to a tooled piece can result in pooling in the background areas giving contrasts and depth. There are oil, alcohol, and water based leather dyes available.
The point of the ester group is controlled by choosing a azo dye with a different alcohol group position. Either the dye or the sugar is reacted with succinic anhydride. This forms an amide group with the sugar or an ester group with the dye. The free carboxylic acid may then react with the alcohol group or amine group on the corresponding dye ...
Dyes make up the final 2–3% of the polish. A traditional dye is nigrosine, but other dyes (including azo dyes) and pigments are used for oxblood, cordovan, and brown polishes. [3] Owing to its high content of volatile solvents, wax-based shoe polish hardens after application, while retaining its gloss. [4]
Haematoxylin remained important as a black dye (using copperas or chrome as a mordant) for wool until the 1920s when a black synthetic dye compatible with wool became available. [9] Contemporary usage of haematoxylin includes the dyeing of silk, leather, and sutures .
Vinylon, also known as Vinalon (more common in Korean sources), is a synthetic fiber produced from reaction between polyvinyl alcohol (PVA) fiber and formaldehyde. Chemically it is polyvinyl formal (PVF). Vinylon was first developed in Japan in 1939 by Ichiro Sakurada, Ri Sung-gi, and H. Kawakami. [1]
Rhodamine B is an important hydrophilic xanthene dye well known for its stability and is widely used in the textile industry, leather, paper printing, paint, coloured glass and plastic industries. [4] Rhodamine B (BV10) is mixed with quinacridone magenta (PR122) to make the bright pink watercolor known as Opera Rose. [5]