Dear list,
In silver printing we generally fight a war against trace thiosulfate and have some efficient quantitative measuring techniques at our disposal. Nothing of the sort exists (at my knowledge) to do the same with the iron processes. It would be convenient if our chemical geniuses could come up with a practical way to measure tolerable residual iron.
Warm greetings from Brussels,
Roger Kockaerts
In a message dated 24/03/2006 22:41:58 GMT Standard Time, rs@silvergrain.org writes:
Loris is fighting a war against trace iron and we may need a stronger
arm.
R
Why ?
Has Loris established the extent of what is wrong with the process we have been using for the past 140 years ? Has he then established the extent to which effort is needed to overcome the supposed problem.?
The manuals over the nearly two centuries of ohotography are full of methods of dealing with problems that do not exist.
Terry
Roger Kockaerts
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Received on Sun Mar 26 13:21:09 2006
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