This invention relates to the use of a hydrosulfide reagent to precipitate {HEAD ~ silver sulfide} from {TAIL ~ spent photographic fixer solutions} 
This invention relates to the use of a hydrosulfide reagent to precipitate { HEAD ~ silver sulfide } from { TAIL ~ spent photographic fixer solutions }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL