There are many materials associated with Tie-Dye. Some are essential, some are very helpful, and some just make the whole process more fun. Chemicals tend to be a part of the "helpful" and "essential" catagories but if you find yourself having fun with them, don't panic.
The required chemicals you simply can't or shouldn't use our Fiber Reactive Dye without are:
Soda Ash Fixer (#FIX) - makes the dye permanent - don't leave home without it!
Urea (#UREA) - helps dissolve the dye and keep moisture in to aid the chemical reaction.
Synthrapol (#SYN) - best for washing out extra dye and keeping your white parts white!