Marigold - This dyestuff consists of dried and ground flower heads of the Tagetes species. It yields rich vibrant yellows, green-yellows and oranges with 20 -30% dried marigold to WOF. Marigold is cultivated all over the world for its decorative flowers, for religious festivals and for its colourant. Marigold has a moderate light and washfastness.
Mordanting: use alum mordant at 15% WOF for protein fibres. For cellulose mordant with tannin at 8% WOF and then alum at 15%, or alum acetate at 8%.
Dyeing: add the dried flowers to the dye pot, cover with water and simmer for half and hour to extract the colour. Strain the dye liquid and add to dye pot. Add fibres and simmer until the desired shade is achieved. With the addition of iron at 2% WOF warm olives can be made.