I, too, have used X-ray film for years, but never the X-ray developer. I can only suggest you get some and try it.
Can you get metol and sodium sulfite? D23 is an inexpensive and very good developer. If not, caffenol is probably your best bet.
A low contrast version of Caffenol works very well with x-ray film. Pick up some washing soda, and instant coffee from your supermarket. Powdered vitamin C from health foods store. Check out recipes online. I've been working with x-ray film for years. My favourite developers for it are Pyrocat-HD, POTA, and Caffenol-LC. EI 50. EI 32 for POTA.
I found a couple. Double-sided, green latitude. Top image developed with stock developer, 20C, EI 100. 8:00. Bottom image, diluted 1+1, 20C, EI 80, also 8:00. Both agitation 5sec every minute, flat-bottomed tray. The 1+1 negative should have gotten more exposure. Probably an EI of 50 would have been better.
Nice samples! I reckon Pota is indeed a nice developer for x rays. I am currently making 'Faux Ambrotypes' with X ray film and checking different developers and timing. Thanks for taking the time to share
Hi Rafael, I'm from Brasil too, i've used this some time ago at 1:8 proportion and the develop time and temp by the dental developing process sheet, you can talk to me on my Insta Kapsa_pictures if you have other doubt in the process