OK, maybe I am reinventing the wheel, maybe this issue has been previously discussed at length (IDK), so I apologize in advance if this is the case. And maybe it would be better to post this contribution to Chris' dye transfer post..... But anyway: I was thinking how nice it would work if one would separately expose a slide with all 3 colors on 3 sheets of RA4 material (possibly transparent), like Kodak Endura transparency, or some Ilfocolor transparent material. (just to check, ordinary RA4 paper would be perfect). Then, you develop those exposed sheets in some ordinary BW developer (with no chromogenic activity) to get the desired contrast. Then you fix in your ordinary BW fixer and you get a BW negative image derived from one color only. PLUS, you can work with a dim 590nm light, not in total darkness (as you should with a panchromatic material). Then you would get 3 negatives ready to be printed onto your gum-bichromate, carbon, DCG or any other material requiring contact printing with a UV source. That would be the "analog route" to big negatives, doable in an average darkroom, without some expensive hardware (you don't even need an inkjet). And probably, any RA4 material is reasonably priced (since it is a mass product) what do you think, fellows?