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