Spent Fixer Salt Prints

[JohnMilleker]

Half I wanted to share, half I wanted to get some big APUG brains on the matter.

The link is a Flickr Group discussion on someone using spent Fixer for a salt print coating. The results are there, but faint. Does anyone know an average round-about percentage of silver in spent fixer? If it's high enough, could the other chemicals in the fixer be causing an issue and if so, is there any way to neutralize the fixer and leave the silver?

http://www.flickr.com/groups/53495661@N00/discuss/72157623301596857/

This would sure be a nice way to use all that spent fixer I've been giving away to my county...

 

[removed account4]

it depends how "spent" it is ...
i don't know how to do the actual math to
tell you if the 10% silver nitrate is in your spent fixer
but there can be around 1/4 oz silver / gallon of spent fixer ....


john

 

[Ian Grant]

Fixer can contain anything up to 10 or even 15 gms/litre silver. however that's with X-ray processing, typical home processing's going to be more like 2-5 g/l. so 0.2 - 0.5%

Yes you can get the silver from fixer easily but you'd still need to convert it to a usable silver salt.

The idea linked to falls down because of the presence of Thiosulphate

Ian