How To Dye Yarn Naturally. For iron, copper, and tin mordants, use 1/2 ounce (two teaspoons) per pound of fiber. Naturally dyed yarn on the isle of skye.
The dye can be in powder or liquid form. If necessary, add more water. If you are dyeing silk or cotton yarn you don’t need to worry too much because both fibers will be able to withstand higher temperatures.
Pour the dye back into your stockpot.
Chop up your dyestuff, or mush it up a bit if it's berries and cover with water (about twice the amount of water to dyestuff). For plant based, you will use fiber reactive dye. Moel view yarn is a natural dye studio. Add the yarn to the water bath and slowly bring to a boil.