Tadhgo
Established
Hi I'm just wondering how people dispose of used Developer, Stop and Fix? Thanks.
sevo
Fokutorendaburando
Modern developers that can safely be handled without protective wear can be mixed with the stop and disposed of down the sink. Some ancient recipes and the odd few modern exceptions need special safety procedures in any case, so you should know if you use an exception from the rule.
If you have a small (single home) septic tank system, you might leave it standing in a bucket for a few days, to oxidise any remaining active agents so that they do not use up the scarce oxygen in the septic tank.
Once de-silvered, fix can be dumped down the drain - but unprocessed, it can damage the septic system or the biological stage of a waste processing plant. Besides, there are a few € worth of silver per litre in depleted fix. So fix should be reprocessed - in metropolitan regions, you can have it picked up for free or will even get some money for it. Out in the country, you could ask the local radiologist if he still has a courier pick up his X-ray fix. Or you might store it in a bucket with some iron filings or steel wool to de-silver it, and mail in the resulting (bottled or dried) slurry to a silver reprocessor once in a while.
If you have a small (single home) septic tank system, you might leave it standing in a bucket for a few days, to oxidise any remaining active agents so that they do not use up the scarce oxygen in the septic tank.
Once de-silvered, fix can be dumped down the drain - but unprocessed, it can damage the septic system or the biological stage of a waste processing plant. Besides, there are a few € worth of silver per litre in depleted fix. So fix should be reprocessed - in metropolitan regions, you can have it picked up for free or will even get some money for it. Out in the country, you could ask the local radiologist if he still has a courier pick up his X-ray fix. Or you might store it in a bucket with some iron filings or steel wool to de-silver it, and mail in the resulting (bottled or dried) slurry to a silver reprocessor once in a while.