You can dye any protein (animal) fiber just like you would wool. I really recommend using heat setting, though. I've discovered the difference in my wool between just using hot water and actually simmering the yarn. When it's simmered, I hardly have any dye rinse out.<br><br>
If you have a candy or cake decorating store in your area, you can sometimes find packs of paste food dyes for about $5. My pack has 4 pots of dyes, red, blue, yellow and green. And a little goes a long way. Or if you have the little droppers of food coloring, those work as well, although they don't go as far, they should be plenty for a bunch of playsilks. If you're not using KA, you do definitely need to use acid to set the dye. When I'm using KA, I don't add acid.<br><br>
To give you some idea of amounts, I've dyed over 20 (100g) skeins of wool, and have barely made a dent in any of my dyes other than the yellow.