Hello ! I joined this list to get some working-level advice on color management issues. Hope, this is an appropriate place.
My background: About 5 weeks ago, I started playing with the vector-graphics program Inkscape. I made a color drawing for my brother's birthday, which I printed out (png) in a copy shop. On this print, a blue gradient fill turned into a blue to dirty-green fill. As far as I understand, I have to transform the RGB color space into CMYK to get a correct print file as well as being able to soft proof what I am going to print. I installed ECI + Adobe ICC-Profiles and tried the Separate plugin for The Gimp, PDF/X-3 from Scribus, and finally the command-line utilities of Lcms. I don't really understand much of what I am doing, what I actually can do, and how to bypass that the bloke in the copy shop hasn't heard of color management yet + can't give me a printer profile. Also, some of my experiments yield strange, unexpected results. I assume, the png I exported from Inkscape is based on sRGB color space. I used Gimp to convert it into a tif, and if I then tifficc -oISOcoated.icc -t0 file.tif file-CMYK.tif the lightness increases considerably and the greenish hue isn't as bad as on the print but still visible (via IrfanView). The output-profile name is NOT written to the file (hex editor checked). How can such a file be properly displayed? How can it be further transformed, e.g. to a specific printer profile? If I use tifficc -e -oISOcoated.icc -t0 file.tif file-eCMYK.tif the result looks very much closer to the original RGB, just a little less brilliant. Is Embedding how things are supposed to be done? Always? How do I go on with the copy shop now? Is color management only application based or do nowadays (Minolta 2xxx; sorry forgot) machines somehow handle ISO profiles without further adjustment? Is it senseful to make him find his printer profile? If so, i.e. if we have to set it up, is the configuration usually done via the printer-driver interface or via the application (Photoshop)? If I use the Scribus-PDF/X-3 variant, which saves the png and tif intermediates, is an Acrobat Reader in the copy shop a sufficient application for color-managed printing? Is ISOcoated_v2_eci to be preferred over ISOcoated (ECI, 2004), or do you suggest a different profile for my hobby case? Thank you very much for your help H.Lekin ------------------------------------------------------------------------------ Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp as they present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://p.sf.net/sfu/creativitycat-com _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
