Swiss multinational holding company created in 1970 in the merger of two concerns headquartered in Basel-Ciba AG and J.R. Geigy SA. The group consists of affiliates in some 50 countries and engaged in the manufacture and marketing of dyes and chemicals.. Read more..
A mordant is a substance used to set dyes on fabrics or tissue. It is forming coordination with the dye which then attached to the tissue. It can be used for dyeing fabrics, or for intensifying stains in cell or tissue preparations. Read more..
Up to the middle of the 19th century there were only natural dyes, and most of these were vegetable origin; natural indigo being one of the more important dyes. Natural dyes to usually have no affinity for textile fibres until the fibres are treated with aluminum, iron, or tin compounds to receive the dye. Read more..
In 1856 William Henry Perkin, an English chemist, discovered the synthetic dye Mauveine. From this day forward, synthetic dyestuffs began to supplant natural dye. The synthetic-dye manufacturing industry founded by Perkin in 1857, Read more..