
For the past week, I've been experimenting with dying yarn in the microwave. It is very simple to dye wool yarn or wool roving using food dyes. You can use cake/icing dyes or food coloring or even Kool-aid packets. I like to use Wilton gel dyes (meant for cake decorating), because a small amount of gel goes a long way.
First I soaked the yarn in a mixture of vinegar and water. The vinegar acts as a mordant and helps the dye bind to the wool. I used a microwave-safe ceramic dish with a cover to hold the yarn and vinegar-water bath. Next, I prepared the gel dyes by mixing them with water in small pyrex cups. For these examples, I mixed up 2 or 3 different shades for each skein. The yellow-orange yarn was made with lemon yellow, golden-yellow, and orange. The bluish yarn was made with royal blue and violet. The lime yarn was made with lemon yellow and leaf green. The darker green yarn was made with teal and leaf green.
I sprinkled the dye on the yarn somewhat haphazardly to give the yarns a variegated look. I covered the dish and microwaved the yarn for around 5-7 minutes until the water bath was clear (meaning that the dye had absorbed into the wool). Then I rinsed the yarn in cool water to get rid of the vinegar smell and hung it to dry. You can also dye larger amounts of yarn on the stove with this basic method, but you have to be careful not to agitate the yarn too much or it can start to felt together. The pink thing in the photo is a hyperbolic crocheted plane made from non-dyed store-bought wool.