In message <50be5632b6a.m.conroy@xxxxxxxxxxxxx> Andrew Conroy <a.m.conroy@xxxxxxxxxxxxx> wrote: > I've just created a test page in Artworks consisting of stripes of pure > C, M, Y & K and then exported this as a PDF. On RISC OS, this still > appears to be pure colours, but when viewed on a PC the colours get muted > and look like 'dirty' C, M, & Y. More likely, they look more like real CMY inks that get printed. > Have I missed something, or am I doing something wrong? I assume > Artworks is creating the PDF correctly! If you define colours in the CMYK model, ArtWorks puts CMYK definitions in the file. The default way of displaying CMYK colours in ArtWorks (but see the option below) is to use the standard naive conversion by channel inversion, which bears little relation to how the inks look when printed. For instance, the Magenta is far too bright and pinkish. There is no "official" way of displaying CMYK colours. The only proper way to "display" a CMYK colour is to mix inks and put them on paper, and of course, even then, you have many different kinds of paper for a start, which result in very different colours, so any given CMYK colour can look very different. The default in Adobe Reader is to do ink simulation. You can get a similar rendering in ArtWorks by switching on the "Simulate CMYK inks" option. OvationPro has the same option, which even works for colours in embedded ArtWorks files. Impression always uses naive conversion. PhotoDesk has good ink CMYK simulation. RISC OS Select supports CMYK sprites but does naive conversion only. Martin -- --------------------------------------------------------------------- Martin Wuerthner MW Software lists@xxxxxxxxxxxxxxx --------------------------------------------------------------------- ------------------------------------------------------------ To change, suspend or cancel your subscription go to //www.freelists.org/list/artworks ------------------------------------------------------------