Renaissance Underpainting,Two Color Printing and Merging - Double Slide Merging

I read that renaissance painters , Da Vinci and Vermeer was using underpainting technique to create more depth at the surface painting. Their underpainting color was frequently dark umber - burned orange - and grey.

Can we print orange colored traces first and than normal color to the top of it. My understanding is there might be 2 color layers , not single one but may be do these two different printing merging works well ?

Other idea is preparing two slides and register one on other and print together.

Any idea ?

I have no chemical, film, working camera but 10 dollars for 6 months spending at APUG and rest is brain exercising

Umut

This would seem very easy to do if you are using the gum bichromate process, because the colors are actually laid down one over another. The same would seem to go for gum over platinum or any of the other similar processes.

If you are compositing slides, the end effect would be completely different. And as with any enlarger process, the registration of images is not a trivial matter.

What would be the end result of under and upper printed ink jet print ? That is a curiosity.

After checking and comparing the gum prints with paper prints , I will ask more.

Thank you for your reply,

Umut

I checked it and gum bichromate process is more than I could imagine. You can get any pictorialist image from that process.