Formulated to work with both film and paper emulsions. Works well in batch processing, fixing resin based papers in just 30 seconds and fiber based papers in 60 seconds. TF-4 fixer can be used on T-grain films, fixing for six minutes to remove the magenta stain TS-4 is a non-hardening fixer making it ideal for images (film or print) that are to be retouched, toned or hand colored 4 liters of working solution.