Before beginning to mordant or dye cotton, linen, bamboo or hemp fibers, be sure to scour with Synthrapol and Soda Ash to remove any existing oil or wax. This will help the dye to adhere evenly.
Below I am scouring cotton canvas and lightweight muslin with 10ml (2 tsps) Synthrapol and 20g (4 tsps) Soda Ash for each pound of fiber. This simmers for about an hour in batches. Do not overfill your pot. You will gradually see the water color change from clear to yellow depending on your fiber type. I changed out the water several times as I am doing many batches.
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| Yellowing shows evidence that scouring was needed. |
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| Scoured fiber |
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