Mordanting: Use alum mordant at 15% WOF for protein fibres. For cellulose, mordant with tannin at 8% WOF and then either alum at 15% or aluminum acetate at 8%.

Dyeing with the extract: The liquid extract may be added directly to the dyebath. Use at 5-8% WOF for a medium depth of shade. When using the extract, the yellow develops fairly quickly, leaving goods in the dyebath for extended periods of time will result in a duller colour.

Dyeing with the wood: When using the osage sawdust, use at 15-30% WOF for medium shade. Soak it in water for a few hours or overnight. When soaking is complete, bring this bath up to simmer and cook for an hour. Strain off the dye liquid and use for the dyepot. Add the fibre and simmer for about 45-60 minutes.

Options: Dyeing in a copper dyepot or adding a few clean copper pennies to the dyebath will brighten the yellow. Adding 2-4% iron to the dyebath will produce olive greens. Over or under dyeing with indigo yields bright emerald and leaf greens.

For in-depth information on natural dyes see our Guide to Natural Dyes available on naturaldyes.ca. Also available as a Printable PDF