In {TAIL ~ a process} for treating used, photographic fixer solution having {HEAD ~ a pH} of about 3.5 to 7.0 and containing from 0.74 to 1.3 moles of spent alkali thiosulfate therein and containing dissolved silver by the addition of a chemical reagent thereto, the improvement comprising, 
In { TAIL ~ a process } for treating used , photographic fixer solution having { HEAD ~ a pH } of about 3.5 to 7.0 and containing from 0.74 to 1.3 moles of spent alkali thiosulfate therein and containing dissolved silver by the addition of a chemical reagent thereto , the improvement comprising ,
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH