I thought this information would be useful to B&W darkroom users.
I've had some problems with a yellow edge stain on some Kentmere, Foma and Oriental papers. I contacted technical staff at Kentmere, they sent me the following response... "we were forced to remove minute traces of cadmium from the emulsion formulation under environmental laws,and as a consequence the paper has become more susceptible to developer induced fog-the Yellow staining you are unfortunately experiencing.
In our catalogue (Kentmere) we advise that this product is not compatible with phenidone-based developers.We have also found that very active standard PQ developers can create the same fog.If this is the case using the developer more dilute and reduce the developer temperature and reduce the development time. We test using standard Ilford and champion PQ developers @ 1-12 at 20°C developed for 90-120 secs with no staining.
After working hard to find a developer that develops rich blacks - lPD, now I have to find a replacement. Any suggestions on paper developers that meet the above requirements? I was thinking about Ilford Bromophen.
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