Dyeing wool yarn with food coloring is very easy and fun In a Pyrex, cover and soak the yarn in water, mixed with vinegar (1/4 cup per quart of water) for about a half an hour. In small bowls mix small amount of gel colors with warm water, we used about a cup of water in each bowl with about 1/2 Tsp coloring.Now carefully pour the dye on yarn so that the colors please you making sure you lift and get underneath the yarn. We then placed the pan in a 250* oven and checked it in a half hour. you want to take a spoon and check if the water is clear, if it's not them turn the oven up to 300* and continue to heat until it's clear. After heating the dye, let it cool gradually to room temperature, then rinse the newly dyed yarn by hand with cool water., wring it out and hang it to dry..then Happy knitting!