This is my first post on this forum,although I have been contact printing for a long time.I recently aquired a Curtis Contact Printer. This thing has 4 lighta, Red,Green,Blue and unfiltered incandescent. The lights are rotated via a crank,so that only one light is under the exposure glass at a time. Since Curts manufactured one-shot tri-color cameras (I have one) I think that this devise was intended to print B&W color separation negatives onto color paper. But since the lights are RBG,not CMY, perhaps it is more suited for printing color negatives onto color paper. But even that generaly uses CMY filtration. So I am wondering what the original purpose of this thing might be.
Any ideas?