Used developer

MNossi · 2014-06-13T19:35:12+00:00

Hallo! Wie macht Ihr das mit gebrauchtem Entwickler? Wie lagert Ihr diesen und entsorgt den dann? Danke für Eure Antworten! Mario

MNossi

Hello! What do you do with used developer? How do you store it and then dispose of it? Thanks for your replies! Mario

Urnes

You can leave the developer to oxidise in the open bottle and pour it down the drain. Fixer is more of a problem because of the dissolved silver. That needs to go to a collection point. To reduce the volume, you can precipitate the silver using zinc powder. You can then pour the liquid down the drain, but the silver sludge needs to go to the hazardous waste collection vehicle. Regards, Sven.

moma

Cool.

Urnes

You’ll need about 1 teaspoon of zinc per 10 litres. If you dip a copper paperclip into the residue, you can tell if there’s any silver left in it. The silver will deposit on the paperclip when it’s dipped in. Regards, Sven

moma

Thanks, Sven € That would have been the next question. € Have a lovely evening :-)

Wolfgg

Here’s an old thread for the ‘seasoned veterans’: http://forum.fotoimpex.de/index.php?s=21036a9a2c4b6af1c974a5a5cb87104f&showtopic=1853 € Best regards, Wolfgang

moma

And here we go :-)