Tanthathide9 Report post Posted December 15, 2012 How long can the rit dye mix last if it's left in a container with a lid at 3$ a pop I'd like to get more life out if it, is this possible Quote Share this post Link to post Share on other sites
Sylvia Report post Posted December 15, 2012 I would probably address that question to Rit on their website. I know my dry fiber reactive dyes last forever, but they recommend using mixed up ones within 6 months. Quote Share this post Link to post Share on other sites
