The world’s only powder rapid fixer also happens to be the most potent. So potent in fact that you have to further dilute 1 liter of working solution to 2 liters in order to match liquid concentrate rapid fixers. We use the purest ammonium thiosulfate agents to fix your film and make it archival in record time. Just add water! Reusable solution fixes 24+ rolls of B&W or color film and can be diluted to make 1-2 liters of working solution fixer for the traditional 2-bath B&W process or Bleach-Bypass color process.