Fixer bottle has a layer a black coating

[Nikkornos]

Guys, I just found my plastic fixer bottle (stop bath and fixer) started to developed a strong layer of black stuff.

The coating makes the bottle looks like a layer of silver oxide coating.
How can this be possible?

I use Ilford rapid Fixer. 1:19 stop 1:4 fix.

Have you seen something like this before? Yes I do reuse my fixer.

Very odd.

 

[catchlights]

yes, just replace it and dispose the old bottle.

 

[raytoei]

if i remember correctly,
i washed it off before
with soap and water.

 

[edge-t]

Happened to me before when I was using plastic bottles from soft drinks. Stopped happening after I change to another kind of plastic bottles. Don't know if it is the material of the plastic that causes it. Read somewhere to filter it before using the fixer.

 

[lordpain]

Guys, I just found my plastic fixer bottle (stop bath and fixer) started to developed a strong layer of black stuff.

The coating makes the bottle looks like a layer of silver oxide coating.
How can this be possible?

I use Ilford rapid Fixer. 1:19 stop 1:4 fix.

Have you seen something like this before? Yes I do reuse my fixer.

Very odd.

the black soot is silver. i tried cleaning the thing off, but it was no easy fix. i used to have a pdf issued by kodak on how to remove this, but i cant seem to find it. that being said, i just throw my bottle away when it becomes black. also, it seems that it only happens to illford's rapid fix. when i used an acidic fixer, this precipitation of silver did not happen.

 

[Nikkornos]

Ok guys, I fixed it by soaking overnight using Mr. Muscle Mildew cleaner. The Hydrogen Peroxide ate up the silver and now bottle is crystal clear.
I must had recycled the fixer too many times.

Indeed is with Ilford Rapid fix only. And also a lesson learn, a 6X9 film I found to have a layer of silver contamination.
Looks really dirty on film. Shanghai GP3.

 

[Nikkornos]

Silver concentration

The level of silver in a film fixing bath can be allowed to rise to 8 – 10 g/l without serious effect.
The level of silver that can be tolerated in a paper fixing bath depends on the type of paper being processed and the....

http://www.ilfordphoto.com/Webfiles/2006130218312091.pdf