Internegatives are certainly viable. My point was that successfully making them and printing from them can be more difficult.
Originally Posted by lxdude
I'm not sure it's THAT difficult though. I've thought about picking up an old slide duplicator and using it to shoot dupes of slides on neg film. But there are color balance issues, color temperature issues with your light source (both needing filtration) and you pick up contrast, for which I think some people preflash the film and... yeah, not nearly as simple as Ilfochrome (or type R for that matter.)