U of S | Mailing List Archive | alt-photo-process-l | Re: curve for polymer film

Re: curve for polymer film

Salut Jean-Claude,

My experience working with ImagOn is that it is much more fragile (but cheaper) to work with than photo polymer plates.  There are also many  more steps involved and it's generally coarse looking stuff overall.  If photographic tone is what you're after, I'd recommend you look at polymer plates and skip ImagOn.  Leave it for the graphic artists to wrestle with.  There's alot more written on polymer plates besides.

If you decide to take that route, I recommend Toyobo KM73 plates available from Box Car Press.  The curve I use with them is posted in my Polymer Photogravure procedure page, which might be a good starting place for you, considering you've already got some experience with ImagOn.  The URL is:


The curve I'm using is posted there for reference, but I don't go into how I derived it since it's been a continuing process as my variables change as I refine my workflow.  There's been alot of work done on new methods for deriving process compensation curves since Dan Burkholder's wonderful book.  Mark Nelson's Precision Digital Negatives process has yielded great results for some people using polymer.  A new book that came out recently that greatly simplifies the process of deriving curves for Alt Processes is called "Digital Negatives: Using Photoshop to Create Digital Negatives for Silver and Alternative Process Printing".  It's available from Amazon and I highly recommend checking it out.

Focal Press Books For The Win!


jean-claude Pronier wrote:
93D27A7F-657B-47DA-A9BA-A343B69612B4@wanadoo.fr" type="cite">Bonjour
Last year I spent much time  working with ImagOn photopolymer. The results where so and so, I finally stopped working on the process.
Difficult to talk densitometer even step tablet with photopolymer users not very interested in photography but art etching etching.
Polymer film is UV exposed under B&W positive film and it seems very difficult to obtain shadows, mid tones and lights with only one plate.
Now working on inkjet printed negative for VDB process, thanks to Dan Burkholder, I think may be inkjet positive printed on pictorico would work assuming I apply the good curve.
Is somebody working on the same process?

Jon Lybrook
Intaglio Editions