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It is a substantive dye, needing no mordant, yet the color achieved is extremely fast to washing and to light.
The manufacture of natural indigo lasted well into the early 1900s.
The leaves were fermented, the sediment purified, and the remaining substance was pressed into cakes.
Indigo prevailed as the preferred blue dye for a number of reasons.
The woad was a shrub that grew abundantly in parts of Europe.
The coloring was in the leaves, which were dried and ground, mixed with water and made into a paste.
By the 4Purple was made from a mollusk and clothing made from it was so expensive only the royal family could afford it.In 1856, William Henry Perkin, while experimenting with coal tar in hopes of finding an artificial quinine as a cure for malaria, discovered the first synthetic dye stuff which he called "Mauve".