This file was created in photoshop & illustrator, and I'll be printing it digitally on a color laser copier at Kinkos. As you can see, there are a lot of very light tones and that when printed, a good portion of the underlying paper will show through. And if I were printing on white paper, it would be fine. However, I want to print on manilla or ivory colored paper, but still keep the light tones as white (or very light greys) rather than them appearing to be manilla/ivory like this:
I'm pretty sure that without white ink (on a press) this cannot be done, but I'd love to be proven wrong. Any ideas/suggestions for getting close are welcomed.