My husbands old tee-shirts were all white which makes a very boring ball of tarn. I decided to infuse them in a rainbow of colors using a Tulip tie- dye kit. It was super easy I layed out my tarn in long skeins on top if plastic and squirt the colors in yellow, red, blue pattern. Once soaked I covered with plastic for several hours. I rinsed until it ran clear then dried. Tadaa! Beautiful rainbow skeins!