I don't think you need it that strong for clearing polaroid film. It seems I threw about a table spoon of it in a 5x7 tray with water and that cleared a half dozen type 55 negs just fine. Photoformulary has it and it is a great chemical to have on hand. Order some Metol and sone Sodium Metaborate and you can make D76H and Split D-23 and of course, hypo clear. I buy it 10lbs at a time.