I'm in the first "holy @%^<!!!" stages of exploring multi color gum printing. *
But... currently my interests are in fairly big work, making the above a possible dead end long term. The price of 11x14 sheet film activates my gag reflex. Meanwhile, Arista Ortho film is available up to 24"x100'. Also, I am on somewhat of a mission to separate my digital work completely from analog, and have zero interest in using scanners and inkjets for neg creation. Thus my questions:
Is there a way to use ortho film for color seps without a mess of generations? With Ortho not being red-sensitive I can see trouble there... are there any workarounds to go straight to ortho from color?
Can gum bichromate be exposed via a UV enlarger (if registration issues are addressed)? If adequate UV can come blasting from an enlarger lens, will it properly expose a gum emulsion?**
I could easily do color seps from an E6 image via enlarger or contact printing, to 6x7 or 4x5 panchromatic B&W... I assume I could contact-dupe those negs for a positive, and then enlarge them to 11x14 or 16x20 Ortho film in a more standard enlarger setup. This would give me a contact-print workflow and should have no registration issues - I could pin register the large negs as they are exposed.*** (Yes, that puts me in multi-generational territory with contrast-ready lith film).
Can color seps be made via contact printing (filtered light to E6/pan neg sandwich?)
Sorry for the long post - responses much appreciated!
**********
Even longer-winded notes:
*I've got a graphic arts background with lots of experience with color seps, spot-color "kiss" plates, and working with registered graphics. (though I've never made my own seps, more of a mindset of what one can do with multi-plate printing beyond CMYK). I've even got my old pin register gear.
**My video biz gives me access to things like CDM lights with high UV levels, and I would have no problem making a fan-cooled CDM enlarger (I have a DIY bulb & ballast, 150 watts with about a 600-watt tungsten equivalent that requires UV shielding). Would need to test things like heat glass and condensers blocking UV though. And a shutter as these lamps need a 5-minute warmup.
***I have duplicated positive E6 film via enlarger, even from 35mm to 8x10 with gorgeous results.
But... currently my interests are in fairly big work, making the above a possible dead end long term. The price of 11x14 sheet film activates my gag reflex. Meanwhile, Arista Ortho film is available up to 24"x100'. Also, I am on somewhat of a mission to separate my digital work completely from analog, and have zero interest in using scanners and inkjets for neg creation. Thus my questions:
Is there a way to use ortho film for color seps without a mess of generations? With Ortho not being red-sensitive I can see trouble there... are there any workarounds to go straight to ortho from color?
Can gum bichromate be exposed via a UV enlarger (if registration issues are addressed)? If adequate UV can come blasting from an enlarger lens, will it properly expose a gum emulsion?**
I could easily do color seps from an E6 image via enlarger or contact printing, to 6x7 or 4x5 panchromatic B&W... I assume I could contact-dupe those negs for a positive, and then enlarge them to 11x14 or 16x20 Ortho film in a more standard enlarger setup. This would give me a contact-print workflow and should have no registration issues - I could pin register the large negs as they are exposed.*** (Yes, that puts me in multi-generational territory with contrast-ready lith film).
Can color seps be made via contact printing (filtered light to E6/pan neg sandwich?)
Sorry for the long post - responses much appreciated!
**********
Even longer-winded notes:
*I've got a graphic arts background with lots of experience with color seps, spot-color "kiss" plates, and working with registered graphics. (though I've never made my own seps, more of a mindset of what one can do with multi-plate printing beyond CMYK). I've even got my old pin register gear.
**My video biz gives me access to things like CDM lights with high UV levels, and I would have no problem making a fan-cooled CDM enlarger (I have a DIY bulb & ballast, 150 watts with about a 600-watt tungsten equivalent that requires UV shielding). Would need to test things like heat glass and condensers blocking UV though. And a shutter as these lamps need a 5-minute warmup.
***I have duplicated positive E6 film via enlarger, even from 35mm to 8x10 with gorgeous results.
