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A Beginner's Guide to Using Mordants in Natural Yarn Dyeing

Updated: May 3



If you're delving into the world of natural dyeing for your wool yarn, understanding mordants is essential. These magical chemicals help your dyes stick to your fibers, ensuring vibrant and long-lasting colors. Here's a handy guide to get you started:


1. Prepare Your Mordant Solution

Follow the instructions on your mordant package to create the perfect solution. Mix the mordant with water, adjusting the amount based on your yarn quantity.

2. Soak Your Yarn

Immerse your wool yarn in the mordant solution for at least an hour, or even overnight for optimal results. This step primes your fibers for dye absorption.

3. Prepare Your Dye Bath

While your yarn soaks, it's time to concoct your dye bath. Get creative with natural dye sources like plants or berries. Chop them up, toss them into a pot of water, and bring it to a boil, then simmer.

4. Wring Out Excess Liquid

Once your yarn has soaked up the mordant goodness, gently wring out any excess liquid. Your yarn is now prepped and ready for its colorful transformation.

5. Dive into the Dye Bath

Submerge your mordant-treated yarn into the simmering dye bath. Let it soak for at least an hour, stirring occasionally. Adjust the dye intensity by adding more materials if needed.

6. Rinse and Dry


Once your yarn reaches your desired hue, remove it from the dye bath and rinse it in cold water until the water runs clear. Gently wring out any excess water, then hang your masterpiece to dry.

Remember, safety first! Handle chemicals and hot liquids with care, and don't forget to don gloves and protective eyewear. With these steps, you're all set to embark on your natural dyeing adventure. Happy crafting!


P.S. Here are three common examples of mordants used in natural dyeing:

1. Alum (Potassium Aluminum Sulfate): This is one of the most widely used mordants for natural dyeing. It helps the dye adhere to the fibers and improves color fastness.

2. Copper Sulfate: Copper sulfate is another popular mordant used in natural dyeing, especially for achieving green hues. It can also modify and intensify colors.

3. Iron Sulfate (Ferrous Sulfate): Iron sulfate is often used as a mordant for darker and more muted colors. It can also act as a color modifier, shifting the hue of certain dyes.


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