Pro's: Best dye for cotton, rayons, linens, hemp and other plant based fibers. Best dye for Tie-Dye and Batik. Vibrant wash fast permanent colors. Easy to use. Does not need hot water. Economical! Con's: With silks and wools, colors are still vibrant, but shift. Need to use with the proper chemicals. Do not work on synthetics.
Pros: Quick, easy, economical for small dye jobs, don't have to buy extra chemicals, don't have to handle powders, behaves like Deka L, additional 8 colors for Polyester and nylon! Results are even and not streaky. Cons: Needs hot water, less brilliant and long lasting, may fade more than "professional" dyes, less color selection.
Pros: Historically fascinating to use dyes that have been in use for 100s to 1000s of years!
Cons: Fabrics or fibers have to be treated in a mordant before dyeing. Some of the metallic salts used to "mordant" (prepare for dyeing) the fabrics before dyeing are fairly toxic. We don't carry the worst ones.