One thing I'm doing different with RR-4 is I'll be tray-processing to start, but will be doing standard-temperature RA-4 thereon out, using Supra.
Regards.
I use trays all the time with good results. I use a WR 13 safelight with a 15 watt bulb about 5 feet away directed at the ceiling. I can see just fine.
PE
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