"Natural dye is not a substitute for synthetic dye. It is a different conversation with color.
"KaiRenner26th of April 2026
How Natural Dyeing Works
Plant dyes require a mordant — a metallic salt that bonds to wool fiber and helps the dye molecules attach permanently. Without a mordant, most plant dyes fade quickly. Alum (potassium aluminum sulfate) is the standard mordant: safe, effective, and brightens most colors. The process is: mordant the fiber, prepare the dye bath, and simmer fiber in the bath. The same dye plant on alum-mordanted fiber and iron-mordanted fiber produces completely different colors.
15Percent
180F
Mordant the Yarn
Dissolve alum in hot water and simmer pre-wetted yarn for 45 minutes.
Mordant the Yarn
Weigh your dry yarn. Dissolve alum at 15% of that weight in hot water. Wet the yarn thoroughly in warm water first — dry fiber takes mordant unevenly. Add the wet yarn to the mordant bath and heat slowly to 180°F, simmering for 45 minutes with gentle occasional stirring. Remove, gently squeeze (do not wring), and add directly to the dye bath or store wrapped in plastic for later.
Prepare the Dye Bath
Simmer dye material in water for 45 to 60 minutes, then strain.
Prepare the Dye Bath
Chop or break down your dye material — onion skins, madder root, weld, black-eyed susans. Simmer in water for 45 to 60 minutes. The water will take on a deep color. Strain out all plant material through a fine mesh sieve. You should have a clear, richly colored liquid. Adjust volume with water — you need enough liquid for the yarn to move freely.
Dye the Yarn
Add mordanted yarn to the strained dye bath and simmer at 180 F.
Dye the Yarn
Add the mordanted yarn to the strained dye bath. Heat slowly to 180°F. Hold at that temperature for 45 to 60 minutes, turning the yarn occasionally. Do not boil wool — above 200°F the fibers felt. Remove from heat and let the yarn cool in the bath for deeper color. The longer it cools in the bath, the more color it absorbs.
Rinse and Dry
Rinse in similarly temperatured water and hang to dry away from sunlight.
Rinse and Dry
Remove yarn from the dye bath and rinse in water the same temperature as the bath — sudden temperature changes felt wool. Rinse in progressively cooler water until the water runs clear. Gently press out excess water (do not wring) and hang to dry away from direct sunlight. UV fades natural dyes over time.
Good Beginner Dye Plants
Yellow onion skins — strong, reliable yellow to gold
Madder root — rust, red, orange depending on pH
Black walnut husks — deep brown, no mordant required
Weld (Reseda luteola) — bright clear yellow
Indigo — blue, requires a separate reduction process
pH Shifts Color Dramatically Add a tablespoon of vinegar to the dye bath for warmer, more acidic tones. Add a small amount of dissolved washing soda (sodium carbonate) for cooler, greener tones. pH modifiers are particularly dramatic with madder (red to orange to purple) and black bean dye (blue to green). Always add modifiers after removing yarn from the main dye bath.
"No two batches of natural dye are identical. That is not an inconsistency. It is the medium.
"KaiRenner26th of April 2026