Ben,
Well, I took a look at the data sheets for the Foma papers I use, namely Fomabrom 111 graded and Fomabrom Variant 111 (glossy, fiber-base). I says the following:
"Safelighting
FOMABROM is routinely processed at indirect safety illumination with wavelength of 575 nm and higher, corresponding colour of safety illumination is yellow, yellow-green, amber or orange colours are recommended. Regarding its high sensitivity the processed material has to be exposed to such illumination only for the time necessary for its processing. Length of exposure and a distance of the processed material from the illumination source should be tested. Direct light has to be diffused by inserting mat glass."
So, you appear to be correct.
However, I had fogging problems with Fomabrom under Kodak OC safelight filters. The paper definitely didn't pass the Kodak safelight test with OC filters and did when I replaced them with red Wratten #1A filters. Possibly the intensity was too high and the paper would have passed the test with less-intense OC safelight. That said, my darkroom is now quite bright, although red, and the Foma papers pass the test. If your paper (which I don't use), passes the test, then you're fine.
The Fomatone seems to be less sensitive to light than Fomabrom. Here's the info from the data sheet:
"Safelighting
FOMATONE MG is routinely processed at indirect safety illumination with wavelength of 610 nm and higher, corresponding colour of safety llumination is orange. Regarding its
low sensitivity the processed material can be exposed to such and/or another adequate type of safety illumination for longer period than common types of black and white papers (Fomabrom, Fomaspeed, etc.)."
It appears I should modify my blanket statement above to: Fomabrom and Fomaspeed will fog less easily with a red safelight than OC illumination, or something similar.
Best,
Doremus
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