I oven-dyed some BFL roving with Acid Dyes – my first try with Acid Dyes 🙂
I mixed red from yellow and magenta, purple from magenta and midblue, and green from yellow and turquoise. The green turned into yellow unfortunately because the turquoise washed off completely. I Put the presoaked roving into the glass dish, mixed the colours first in a smaller volume of water containing mordant and then diluted it some more in water with mordant. I’m using Kenanthrol Acid Milling dye and Ammonium Sulfate as mordant (3g/L). Then in the oven, covered with tinfoil, 30 mins @ 180°C, i could see it boiling in the oven. After taking it out I left it to cool, then rinsed it in warm water (that was when nearly all the green came washed out, altho all the other colours were nicely fixed, the turquoise seemed to have issues).
I’m very happy with the results, apart from the nearly totally disappeared green. I’d love to use it for another Thorpe hat as a Christmas present for my flute teacher, so I better get going 🙂