Expiration on Mixed Procion Dyes
  • I mixed up a bunch of dye batches using water, urea, Procion MX and a little sodium alginate. They have been sitting in the cabinet in plastic squirt bottles. (some for a month and some for 2 months) What are the chances they are still good to use? I hate to waste all of those good supplies!
  • Unfortunately, the shelflife of PMX dyes once mixed with water is minimal--a few days at best. I would not recommend using any dye that has been in solution for longer than a couple of days. For future reference, try not to mix up more dye than you will immedietly need. This will help minimize waste. I'm sorry to be the bearer of bad news, but I think those dyes in your cabinet are going to have to go!