I was going to use rit dye to dye parts of my revolution bag black but am slowly thinking it is not going to work as well is i thought. I guess rit dyes might not take well to the material of the bag. Has anyone tried or know anything about it?
Found the following online: (I think revo bags have some sort of stain repellent on them)
Cordura is made of nylon and can be dyed with the use of acid dyes (see "About Acid Dyes"). This requires an acid dye, a cooking pot that is large enough for the garment to move freely but which will never be used again for food, and a mild acid such as vinegar. However, if there is any finish on the fabric, such as a water-repellant, stain-resistant, or permanent-press finish, the dye will not be able to reach the fabric evenly, so it cannot be dyed successfully.
Although the brand name "Cordura" is said to have been applied first to rayon, I think that it's safe to assume that any Cordura sold recently, or in the last few decades, is truly nylon. As long as it has not been treated with any sort of stain-resistant or water-resistant finish, it should be possible to dye it like any other nylon. Just as you were intending, I would recommend that you get a small sample of the fabric you are considering using to run a test on first, before making a great investment of materials or time.
The most washfast black dye for nylon is the Lanaset Jet Black. It's easy to use although it does require steaming to set the dye. You can buy the Lanaset dyes from PRO Chemical & Dye in the US and Maiwa Handcrafts in Canada, as well as several online stores that specialize in selling dyes for wool. See "Who Sells Lanaset Dye?" Or, you could use any good black fabric paint. Dye will wear better than fabric paint, but paint can be set with ironing or by heating in a commercial clothes dryer, rather than steaming, or even, before applying it, by adding an acrylic catalyst, such as Jacquard Products' Airfix.