I'm not sure if you have this.... The fixer is good for film and paper. It's the same chemical. It may even be the same dilution. But, once the bottle of working solution in the bottle is used for one media (film or paper), it may NOT be used for the other. Mix up the fresh batch, separate them into two bottles and label them "for film" and "for paper". Then you can re-use them until they are exhausted.