How to Dye Wool with Japanese Maple

Materials & tools you'll need

Step 1 — Prepare the Japanese maple dye bath

Gather Japanese maple branches for dyeing, then clean and trim them, removing any leaves or small twigs. Place the prepared branches in a large pot filled with water, cover it with a lid, and let it simmer for about 30 minutes, until the water takes on a deep green hue. Remove the branches from the pot and strain the liquid into another pot, reserving this dye bath for the dyeing step ahead.

Step 2 — Prepare the iron water mordant and pre-soak the wool

Prepare an iron water solution by dissolving one tablespoon of iron filings in white vinegar. Let it sit for about a week, giving it a gentle shake every few days to help the reaction along — this is worth starting well ahead of your dyeing day. When ready, strain the iron water solution and use it to pre-soak your wool skein for about 30 minutes. Rinse the wool well under cold running water and squeeze out the excess moisture before moving on to the dye bath.

Step 3 — Dye the wool

Place the mordanted wool into the prepared Japanese maple dye bath, making sure it's fully submerged. Cover the pot with a lid and let it simmer for 4 to 6 hours, checking on it occasionally to make sure the wool stays submerged throughout. This longer simmer time is what allows the wool to take on the dye bath's deep, complex colour.

Step 4 — Rinse and dry

Remove the wool from the dye bath and rinse it thoroughly under cold running water until the water runs clear. Squeeze out the excess water and hang the wool to dry, keeping it out of direct sunlight. Once the wool is completely dry, gently press out any wrinkles with your hands or a towel. To help set the dye, wash the wool using a mild detergent and let it air dry again.

Step 5 — Optional colour-altering baths

If you'd like to push the colour further, you can repeat the mordanting and dyeing process with additional iron water solution or a wood ash solution to reach darker shades of green. For a warm tan hue instead, use only the wood ash solution as your dye bath. Let the wool dry fully between each colour-altering bath before deciding whether to repeat the process again.

Frequently asked questions

What is the Japanese Maple technique for dyeing wool, and how can I learn it?
The Japanese Maple technique is a natural dyeing method that uses branches from a Japanese maple tree to create a green-toned dye bath for wool. This article and its embedded video walk through the full process, from preparing the branches to mordanting and dyeing the wool.

What safety precautions should I take when dyeing wool with a Japanese maple tree?
Always wear gloves and protective eyewear while handling chemicals, including the iron water solution and any dyes. Keep all dyes and yarn away from children and pets.

What materials and equipment are needed for dyeing wool using a Japanese maple tree?
You'll need wool (such as Briggs and Little Regal Wool in Bleached White), Japanese maple branches, water, iron filings and white vinegar for the mordant, protective gloves and eyewear, and containers for the dye bath and any colour-altering solutions.

How long does it take to complete the dyeing process using a Japanese maple tree?
The dye bath, mordanting, simmering the wool, rinsing, and drying takes roughly 4 to 6 hours in total. However, the iron water solution used for mordanting needs to be prepared about a week ahead of time.

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