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most natural dyes require mordant of some kind to get the dye to stick to the fiber and stay there. many of these mordants can be pretty toxic. i prefer to stick to mordants like alum and iron. i prefer the rusty iron water technique i learned from the book.
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actually my first gallon of iron mordant water was gifted to me from my friends claudia and birdsong. birdsong has her own natural dye CSA called Nature's Cauldron. gotta go check out her website!
they put a couple handfuls of old rusty objects in a gallon jar with water and white vinegar.
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then i gathered 2.5 pounds of french broom. i will definitely harvest in the winter/spring next time as the plant easily pulls up by it's roots in the wet weather-hence getting rid of the non-native invasive plant.
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while the yarn soaked in hot water i strained the plant matter out of the dye and combined the 2 pots of dye. the yarn soaked for about an hour and then i simmered the skeins for about 80 minutes in the strained dye bath. the color came out a deep dark army green- my camera won't capture the color no matter what i do.
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All in all the experience was good- much more work than my acid dyes but i like the idea of using the invasive plants for something. not too happy about the harshness of the yarn but i'm going to try a soak in some hair conditioner to see if that helps.