Ilford EM10 it is - I didn't know what type it is since it's only ever used in the dark. It's sensitive to safelight, too...

I've had it for yeard, but nver figured out a good way to use it. Then I got bored one dy, and ran a whole series of tests: One negative, one paper, all grades. I measured key values (black, almost black, midtone, almost white, white) at constant 10 seconds exposure, hten plotted the readings on graph paper. Suddenly it all became clear, so I can now produce a test print right away - and know what I'll get with 10 seconds base exposure.