[pure-silver] Re: Ilford 2150 machine emits Ammonia??

At 10:57 PM 8/20/2006, you wrote:

Dear Richard,

thanks for your help !

It might be useful to contact Ilford to find out if they can still supply instructions for the machine. 

I do have the manual, that suggested my developer is contaminated.

I suspect the machine is not really clean. A cleaner made from Sulfuric Acid and Potassium Dichromate will remove silver and some other contaminants but will not remove Silver Sulfide deposits. Kodak has a small data sheet on its web site about removing these deposits and also sponge silver. Sometimes it takes scrubbing.
If this machine was out of service for any length of time before you got it there is likely to be crystalized chemistry in it that will not come out with routine cleaning. Again, check with Ilford about suggestions on cleaning and preferred chemistry.

The machine was out of service for over a year and I did scrub a lot. I used a Tetenal Colour Machine Cleaner on it. The tanks of the machine (bar the water/rinse compartment) had a coating of very bright yellow sulphur on them. I scrubbed that using the cleaner (came off very easily) and left the cleaner solution in there overnight hoping it would dissolve away the sulphur I cannot reach mechanically.

I also put in (Ilford reccomendation) some anti-algae solution - they recommend this especially for the rinse tanks, thats where you get some gelatin coming off the print and its great food for algae apparently.

Hmm.

Love,
Snoopy


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