I've only handled 2 kinds of XRay film a double sided and a single sided. Cxs green a Ektascan B/RA which has an anti halation backing. The developer soluble backing is blackish and the emulsion is pink/light colored. Double sided is pink/light both sides.
Rodinal 1:100 might be a place to start with film exposed mid day as if ASA100. There are dozens of developing schemes in this thread though.
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