You can use screen-plates, like the Autochrome -> http://www.apug.org/forums/forum42/7...utochrome.html
You can use a 1-shot camera -> http://www.smugmug.com/gallery/13776...65026459_3dDPF
Or you can take 3 separate exposures through 'color separation filters', Red, Green & Blue.
Or, you can play around with Lippmann photography -> http://www.apug.org/forums/forum42/6...nn-plates.html
As you can tell, this too is an area of interest for me.