I hope this doesn't come out wrong...I think it's great that there are some of you who do this "professionally" and help everyone out with tips and ideas, etc. If it wasn't for you guys I wouldn't have be brave enough to try this. HOWEVER, not everyone can afford to order and ship in the expensive dye or have access to the medium expensive craft store stuff.
I went into my project as a way to do cheap matching shirts for 19 people at WDW. I bought the 5 packs of 100% cotton shirts, the Dylon & RIT dyes from Wal-mart. I do have a Michael's in the nearby large city so was able to get some soda ash. I washed my shirts without fabric softener, soaked them in the soda ash for 20-30 minutes each.
I do not use the full instructions on the dyes, since I wasn't using the dye as the instructions implied. I mixed each full package of RIT with 2 gallons of very hot water. The Dylon I mixed each packet with 4 cups of warm water. I did add the small amount of salt recommended on the packages, because I didn't know if it was important or not. Then I filled my little bottles (I used the bottles from the housewares section of wal-mart for $1 each - I think they are for vinger & oil, ketchup, etc.) and dyed like crazy. I did know I was using "weaker" dye, so I let them sit in there plastic wrap for 48 hrs.
And my shirts turned out quite well, as did those of my 2 sisters who were doing some also. Yes, when I did the first wash they faded a little. But not an insane amount. And now we will wear them on our trip. And after that I will wash them again and maybe they will fade some more, I don't know. But as shirts for a specific trip or event they will do excellectly. If we can wear them again, GREAT! If not, no big deal. Maybe I dye the same ones again next time.
I will say that the RIT did fade a little more than the Dylon. So if I do it again, I'll either avoid the RIT (I had to get it this time because my store was out of red & green in the Dylon) or try it again using less water.
Here's a just a few of my shirts (I've posted in this thread before but god knows I won't find that post again, LOL):
Again, I don't want this to come across harshly to anyone, I just want people to realize there ARE options. If I had the recent rash of negative and/or "Dharma only" posts I wouldn't have bothered to even try this project. And I would have missed out on some great shirts.