Controlling B+W Xpro

[RJMLuke]

With the help other insightful users, this post give future readers a better understanding of the mechanics of a B+W cross process. I have successfully managed to develop a 50' cartridge of super 8 Tri-X and Plus-X as a negative image. I break open the plastic cartridge in the dark, loosen the neat reel and loosely put the film into a tank made to process 8 still 35mm rolls. I found that with such a small image, Microdol-X worked well. I use the recommended time suggestion for the type of film. Now, part of what I am trying to uncover is whether cross processing reversal film to a final negative image affects the final speed of the film. On other forums I have heard that this kind of cross will. If so, one is inadvertently over exposing the film. My hypothesis is that the cross can be controlled by finding what the shooting ISO should be, if the developer will up the speed. My quick thought is that with PX super 8, a film of 100/80 asa, can be exposed in camera at 400/320 asa, and developed as a negative at the time Kodak recommends for PX negative film. The same with TX but at about 800 asa.

I don't know how many people on this site are shooting motion picture film, but I think this technique can allow S8 camera operators to use the standard B+W film under darker conditions and process it themselves. Drying the film, on the other hand would deter many from trying this. Thanks for reading this and taking time to comment. I hope I've been able to articulate this idea well.