Is there any reason why I should not get the 9180 for digi negs?
Christian--
Any modern printer, including the 9180, can probably make very good dig negs. Here are a couple of questions I would ask about the printer:
--Is the inkset capable of generating densities in the UV of 3.2 to 3.5? That is the range you need to make a neg that will print pure white on a palladium emulsion with no contrast agent. I expect the HP inks will do that since the Epson inks do it, and actually can go much higher, with no problem.
--It would be interesting to see how fine is the dot pattern of the HP when printed on Pictorico OHP. A dot pattern that looks absolutely smooth on semi matte paper can look rather grainy on OHP. If you do a comparison, I would be interested in seeing it.
--At present you could not use the Quadtone RIP to drive the HP printer. For me that would be a problem since QTR is my favorite driver for dig negs. However, there are certainly ways to use the HP driver to make good negs, so that is not a deal breaker.
--Does the HP driver offer a function where you can dial the ink density (sometimes called the color density) up and down over a wide range? That is a useful tool with which to set neg contrast, in the absence of the ink limit controls in QTR. But, even if this function is not offered by the HP driver, you could certainly control neg density by varying the color of the neg, as taught by the PDN system.
If you get one, let us know how well it works. Cheers, Ron-san