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How long does Washaid last?

gregmacc

Member
Allowing Ads
Joined
Mar 1, 2009
Messages
141
Location
Adelaide, Au
Format
35mm
Ilford quote 6 months in a tightly capped opened container. My half full original plastic Ilford bottle of concenrate has been sitting in a dark, cool cupboard for 10 months. I intend to use it for fibre based paper washing and pre Selenium toning. How conservative are Ilford with these recommendations ? ... Should I chance it?
Thanks
 
I'm not familiar with Ilfords , but I have a bottle of Edwal LFN that is at least ten years old, still works like new stock. I use the working strength until stuff starts to grow in it, then toss and mix fresh.
 
It's mostly sodium sulfite correct?

Seems like the concentrate would keep but I'm bumping this so hopefully someone that knows something can add their experiences/thoughts.
 
"Simon sez", I tend to believe what he says.
 
Nope, not doubting Mr Galley's expertise in this area.
We posted at roughly the same time and I hadn't noticed his response.

I have some concentrate that came from a no-name/generic manufacturer and it's getting old so I was watching this thread with interest.

What are the main ingredients? Is it generally sodium sulfite?
 
For the chemists out there:

Is there a simple test that would indicate that the level of sulphite has diminished? (It becomes sulphate, which is not an effective washing aid).
 
I'm sure after this length of time, it should be fine. I had some Fotospeed equivalent that after 3 years began to crystallise - it may have been sooner as I don't use much. At this point -before I realised - it did stain the prints quite horribly. If you want to check then there is no harm running it through some filter paper - if it is crystallising, dump it.
Regards, Mark Walker
 
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