Quote Originally Posted by blackmelas
1. The other day I attempted to print on Polymax IIRC in the above chemicals and the midtones came out seriouly mottled in freshly mixed developer and rapid fix. I ruled out that I had mistakenly mixed chemicals or hadn't cleaned trays properly, because I successfully printed on Ilford MGRC and FB papers for the rest of the night. Any Idea what happened with the Polymax?
How fresh is the paper?
And also did you agitate well during development?

Quote Originally Posted by blackmelas
2. Last night, after successfully printing a negative to MGRC, I decided to have some fun and print to MGRC warmtone for the first time. Using the same exposure, f-stop and contrast filter for the warmtone I came up with an underexposed print, about two stops/zones short. I was able to get the print I was looking for by opening the aperture one stop and doubling the exposure (a little less than double to be exact). I couldn't find anything in the pamphlet in the pack of paper to say that there was ISO change between the papers. What happened?

3. Does anyone find MGFB in a half or full stop slower than RC? They're both rated at ISO 200 with filters #0-3 and 100 with #4-5, right?

2. Yes MG-WT is much slower than MGIV and that is documented in the pamphlet ISO Speed is 200 for MG and 120 for MG-WT. Also I find it to be 1/2 to 1 contrast grade softer.
And you have to make lillte tests on both. I found that doublng the exposure seems to be enough.

2. MG-FB seems a tad slower than MG-RC, but I think is more of a matter of the differences of look with and withouth the resin coating.