Ever put two rolls of film in at once?

Showing as a blank page here Alf?
 
I've seen it done but never tried it, I've considered trying it through the RB67 but I've never got round to it.
 
Much better thanks Alf!... it is interesting and i wouldn't mind seeing other results, another thing that could be cool.... i need to get more film savvy to try things!


Steve just seen your post come up........ DO IT! DO IT!
 
alfbranch said:
I was looking on Flickr Explore when I came across an image taken with colour slide and B&W in the same camera one exposure.
Click to expand...


both films are c41 process ,,,,no trannies to be seen anywhere :D
 
Bipack film as it was known used to be very useful for effects in the film industry, for example in 3 strip Technicolour cameras (the process by how films like 'Gone with the Wind' and 'The Wizard of Oz' were shot) 3 strips of B&W film would be exposed simultaneously, with the light path initially being split into two with a beam splitter which would expose panchromatic film behind a magenta filter (providing the green channel) and then the other path would expose the red and blue strips. These two channels however were clever in that they were bipacked with the blue film strip on top and being orthochromatic (and hence insensitive to red light), and having an orange-red dye on it which would filter the red light so that it was transmitted through to the panchromatic red film strip at the back (so hence both strips were exposed with their respective channels). All of these B&W film strips were then printed to positive by dying them with their respective negative colour dyes (i.e magenta, cyan, yellow) and aligned where the dyes would combine under heat/pressure (this is simplifying it).

The beam splitter and bipacking of course made the process incredibly slow (about ASA 5), and required huge light arrays, but it was for quite a few years the only truly successful colour motion process until Eastmancolour colour negative was released by Kodak in about 1948. Sadly shooting ended in 1954 for the cheaper, easier but inferior Eastmancolour. For anyone interested these pages give a very good overview and details: http://www.widescreenmuseum.com/oldcolor/technicolor1.htm
 
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