I provided mixing intructions to the folks at PF for Pyrocat-HD and Pyrocat-MC in glycol and they mixed up liter bottles of the two solutions for me today. This afternoon I exposed three sheets of 5X7 fillm identically and tonight developed one in the original Pyrocat-HD in water, one in Pyrocat-HD in glycol and a third in Pyrocat-MC.
The first two are virtually identical in density, contrast range and stain color and density, as I would have expected from my own comparison tests. That means that when using the glycol based -HD any development data one might have worked out for the water mixed version can be used without any modification. The Pyrocat-MC negative has a slightly higher visible contrast range, and the stain is more intense, so some slight decrease in development times should be anticipated when using it. All of this is by visual analysis since I am without my testing equipment while on the road.
Also, I asked Bud about date stamping the developer and there will be no problem in doing that. He did mention, however, that the Pyrocat-HD kits they have been mixing in the past are generally sold withing two weeks of when mixed.
In any event I believe PF will be offering both of these kits for sale within a fairly short period of time. Check with them for details as to exact date and pricing.
Sandy
The first two are virtually identical in density, contrast range and stain color and density, as I would have expected from my own comparison tests. That means that when using the glycol based -HD any development data one might have worked out for the water mixed version can be used without any modification. The Pyrocat-MC negative has a slightly higher visible contrast range, and the stain is more intense, so some slight decrease in development times should be anticipated when using it. All of this is by visual analysis since I am without my testing equipment while on the road.
Also, I asked Bud about date stamping the developer and there will be no problem in doing that. He did mention, however, that the Pyrocat-HD kits they have been mixing in the past are generally sold withing two weeks of when mixed.
In any event I believe PF will be offering both of these kits for sale within a fairly short period of time. Check with them for details as to exact date and pricing.
Sandy
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