The best choice for tub dyeing silk and wool fabrics, skeins of silk or wool yarn, feathers, etc. You can also paint or print with with it if you fix it by steaming. For tub dyeing, use these dyes on your stove or in a washing machine, keeping in mind that they do require very HOT water or steaming for best results.
eBay
Why Dharmaset?. A lot of wool dyers prefer Dharmaset to regular Acid Dyes. As do felters who use hot water in their felting process, as the Dharmasets won't bleed, but the Acid Dyes will. Dharmaset Dyes have a couple of cons as well, so you make your choice.
eBay