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