Is it possible to split up a package of d-76 into small zip-lock bags for travel processing? I believe I read somewhere that the chemicals in the mixture separate out so if you do not mix the whole bag you get uneven proportions.
Is there a particular developer where this is not a problem. How about powdered fixer?
I ask because I ruined 40 negatives last year going through the x-ray machine in Jakarta last Christmas, so would prefer just to pack my Orbital and develop on-site. I have an old book from the fifties on black and white development and it shows a guy using one-shot sachets of a universal developer, but I guess those are not available any more?