Re: [Gimp-user] any tricks for making black look really black
Kevin Cozens wrote: > When it comes to printing, black ink by itself won't give you a real > dark black. The blackest-black you can get when printing in CMYK is > C-75 M-68 Y-67 K-90 (from a formula on a web page). These percentages > are different than I remembered. The main idea is that you need more > than just black ink. That's not correct. The amount of black generation is controlled by the target CMYK profile, and you just can't create something that is blacker than your RGB black when working in RGB. GIMP is an RGB editor, it can't produce CMYK separations unless you use a plugin, so the CMYK value in the picker is just a guide of how your colors are going to be separated when your RGB image is converted to a specific CMYK space. You can't force values. Those CMYK values you provided could be good for a certain CMYK space (which as a 300% total area coverage) but could be unsuitable for other colorspaces. At the end it doesn't even matter, as you're absolutely unable to control how the profile will separate your RGB into CMYK unless you're using a tool that lets you control that. In kwisj's case, I'd try to figure out why the printer is producing a weak black separation (maybe pulling a pure black from the separation, without any CMY beneath). That's unlikely that is caused by GIMP or the file produced in GIMP, it would be the same producing an sRGB image from any other program. Gez. ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
Re: [Gimp-user] any tricks for making black look really black
El dom, 29-11-2015 a las 16:47 -0300, Gez escribió: > > In kwisj's case, I'd try to figure out why the printer is producing a > weak black separation (maybe pulling a pure black from the > separation, > without any CMY beneath). > That's unlikely that is caused by GIMP or the file produced in GIMP, > it > would be the same producing an sRGB image from any other program. Aaaand, replying to myself. If that's what I suspect (the printer/RIP producing pure K plate from the achromatic values), maybe there is a way to prevent it: Try to add some color. Instead of pure black, use RGB 1,1,5. Sometime RIPs, Printer drivers and preflight softwares have specific rules, as converting pure black to K-only black. By making it very dark gray and adding some tint to it, you cheat the RIP so it doesn't do that. That should work giving you a nice, deep black. Try it and let us know how it went. Gez. ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
Re: [Gimp-user] any tricks for making black look really black
On 15-11-04 04:04 AM, kwisj wrote: We are printing onto 100% polyester. the only thing is that the blacks look a littel washed outany tricks for the settings on GIMP to try and work around When it comes to printing, black ink by itself won't give you a real dark black. The blackest-black you can get when printing in CMYK is C-75 M-68 Y-67 K-90 (from a formula on a web page). These percentages are different than I remembered. The main idea is that you need more than just black ink. -- Cheers! Kevin. http://www.ve3syb.ca/ |"Nerds make the shiny things that distract Owner of Elecraft K2 #2172 | the mouth-breathers, and that's why we're | powerful!" #include | --Chris Hardwick ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
[Gimp-user] any tricks for making black look really black
thanks for the repy will change the seetings and see how things pan out Cheers Kwisj -- kwisj (via www.gimpusers.com/forums) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
[Gimp-user] any tricks for making black look really black
Hi we are using a ricoh sg 7100 printer with sublijer R inks and gimp 2.8 We are printing onto 100% polyester. the only thing is that the blacks look a littel washed outany tricks for the settings on GIMP to try and work around this Thanks Kwisj -- kwisj (via www.gimpusers.com/forums) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
