These were transformed with two packets of Blastin' Berry Cherry Kool-Aid:
Since Kool-Aid packets contain citric acid, all you have to do is add the packet to water, add your project, heat it to the right temperature, and let it sit until the project has absorbed all (or at least most) of the color.
Here's what my bowl of Kool-Aid looked like right before I added a sock:
Here are the dyed socks sitting next to a small ball of the original-colored yarn:
A few quick notes about dyeing yarn with Kool-Aid:
- Only animal fibers (wool, alpaca, cashmere, etc.) will dye like this. Acrylic won't, unfortunately. If your yarn contains nylon for strength (like mine did), you're in luck. Nylon is apparently the only man-made fiber that will dye with Kool-Aid.
- If you have a large project to dye, I would definitely recommend dyeing the yarn before you knit the project. I would also recommend looking into either acid dyes or food coloring options, since Kool-Aid can get a bit expensive on large projects (1 packet per ounce of yarn).