I tried this on a small piece of nylon I wanted to dye black, and it tinted it purple...
This was just a removable strap, so I could get an idea of how it would work.
I heated the water up, but it just didn't take well.

There is still enough left to attempt the item I want to do (LBV vest), but I'm not sure if I should bother. I'd rather have an ugly CP pattern, than a tinted purple CP pattern :3

I may try again with hotter water, and with a bunch of vinegar to help it bite into the fabric.

It was 3 bucks, so it's not a total loss.. But i'm still frustrated. It's drying now and I made a bit of a mess.

I was a bit hesitant because of some of the negative reviews, but the dye worked great for my purposes. I dyed two pairs of white jeans because I could buy them cheaper and more easily than finding the color I wanted. I followed the directions on the RIT website, following the method for doing it in a sink or bucket. I boiled water to make it hot, and also used salt, as recommended. The wine color got very close to the color on the bottle, although I did let the jeans soak in the dye for about an hour, as suggested for the darkest color. I also dyed a pair of light blue jeans; these did not get as dark, but did get a pretty shade of red/purple. Overall, it was a pretty simple process, and I would recommend just using the dye in a basin in the sink and boiling water. I did wash the jeans as soon as I was done dying them so the washer would wring them out, as it was too hard to squeeze all of the water out of the heavy jeans. Using this on white jeans definitely worked well.

Really, the instructions and limitations on the side of the bottle should be part of the listing. Dye is tricky and garments of different types of material are critical to a proper result. This did not work on a polyester/rayon blend but worked very well on portions of a hat that were cotton. I personally would not recommend you purchase a dye where you are not able to read everything on the side of the product's container. Rit has more than just this type of dye. They have dyes for specific man-made materials and instructions can involve adding either salt or vinegar depending on the material. I suggest getting this product at a store that has a variety of dye types and colors where you can thoroughly read the instructions.

while the clothes come out hot pink after dying they then keep slowly discoloring and ruining all of your other clothes! Never ever again. The colors used in the pictures were hot pink and deep purple! Please don't buy this if you love your other clothes.

So far, so good. Had a few towels that got caught in a bleach storm, bleached out spots that made towels look tacky and yet the material was still good. Did the first ones with the wine dye which closely matched the original color. Surprised at how good the towels now look with a rich bright burgundy color. Did a couple of others in the navy dye, also look good. Now it's a matter of seeing how they hold up after a shower and in the washer and dryer. BTW, I did them in the washer and dryer just like a regular wash load except for the cup of salt as indicated in the directions.UPDATE: Washed a couple of items that had been dyed Navy, instructions clearly state to wash dyed materials separately. Threw in a couple of old white T-shirts that are used for cleaning rags, they came out light blue. Wondering now how many washings before dyed items lose all color, will wait and see.