GIMP :: Converting RGB To CMYK
Nov 28, 2012
My CreateSpace pdf in both the Proofer online and the hard copy I just received have great color variance from what I submitted in my pdf cover and interior files. The vibrancy's gone. The bright spring green is dull. The light bluegreens more like gray.
SO, next to learn: I need to know the easiest way to convert my RGB to CMYK files, so I can replace what I've got in my CreateSpace book project interior and exterior spots. I would like to do this in the pdf state, from RGB pdf to CMYK pdf. I am happy to do page by page. The 44-page book has text, plus color images (from original watercolor paintings), with some black ink drawings as well. I work on a MacBook 10.6.8. I assembled the pdfs (page by page as "images") in GIMP 2.8. The original text I formatted in iStudio, easily uploading into GIMP, as images, then working each image in layers. Unfortunately, I didn't realize that flattened images can't be unflattened, so if I need to go back to a pre-pdf pages ('images' in GIMP lingo), I'll have to do quite a bit of reconstructing. The last layered building steps are now bound within the flattened images in 44-page pdf. Fortunately, I can easily alter one page at a time within my full pdf. I want to find an RGB to CMYK conversion that I can do page by page, popping out and back into my full pdf.
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Sep 20, 2012
Is there a way to do batch process of converting .jpg or .tif images from RGB to CMYK?
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Feb 27, 2013
I just downloaded a St. Patrick's day background from i Stock Photo. Nice vibrant green. We all know when converting to CMYK from RGB, there is a color shift but this is pretty dang dramatic. Any basic tips on getting some of that vibrant color back after converting?
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Nov 22, 2011
I am trying to create a header for my e newsletter in Photoshop. I want to put the logo on top of a background of the same color as my logo. I have the CMYK ref for the logo, and this looks fine when I print it out. However, when viewed online or just on the computer - the background red is slightly brighter than in print.
I have tried using an RGB converter to change CMYK to RGB but this hasn't done anything.
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Apr 21, 2008
How a drawing in CMYK can be converted to RGB ? At present i am selecting each element of the drawing and manually converting it.Tried the Visual Basic 'File Converter' option, but it doesn't work.
I hope there is a better way as i have many images to convert.
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Feb 12, 2007
I have a cartoon/photo image that I need printed onto a t-shirt. I made the image in Photoshop CS V8 as an RGB image, and now when I convert it to CMYK for the printer, the image looks duller. Is there any way to maintain the 'brilliance' of the colours when converting?
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Aug 13, 2008
I have about 200 PSDs that were supplied by another designer, and I have to use them in an InDesign document.
Unfortunately some are RGB, some are CMYK and all are layered. I'm wondering if there is some kind of preset or shortcut that enables me to convert them all to flattened CMYK PSDs, without having to open each one up and change it manually.
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Nov 18, 2013
I'd like to convert a file from RGB to CMYK. Normally, I can go into Assign Profile, and just select CMYK. However, in this case (actually hundreds of files), none of them have CMYK as an option. So, all the files remain in Untagged RGB, when I need them to be CMYK US Web Coated SWOP.
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Dec 5, 2012
When working with our product photos, I keep them in RGB and add drop shadows to them by drawing rectangular marquees on a separate layer, fill them with black and then apply gaussian and motin blur to them. Works quite well. Plus with the shadow on it's own layer, I can turn it off in InDesign if need be.
The problem is when I convert the photo to CMYK for offset printing. It's asks if I want merge the layers to which I say no since I want to be able to turn the shadows off if need be, but when I say no, then the shadows get bigger and do not look as good as they did in RGB. If I say yes to merge, then the shadows look the same as they did in RGB but I lose the ability to turn them off in InDesign.
Is there a way to keep the shadows looking the same when converted to CMYK without having to merge the layers? Using PS CS6 64 bit.
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Mar 6, 2012
I work at a small newspaper and use CorelDraw X5 (the rest of the newspapers in our company all use Adobe products).
When we get for example, a logo sent to us (also happens with PDF's that are sent to us as well), many times the black is registration black and I need it to be CMYK.
When we PDF the ad to send it for printing the black is on all 4 plates (CMYK) our printer says, drop CorelDraw spend $2000+ and get in design and CS5 and your troubles will go away. I am hoping there is a solution that lets me continue to use CorelDraw as I love this program and do not want to switch.
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Oct 23, 2012
I want to make macro for converting Vector RGB to CMYK. So I did New Macro Project > New Module > Start Rec. > Converted some vector RGB to CMYK > Stop Recording .
Then use same macro to other but it didn't work like photoshop action. VBA basic knowledge, So any easy method can some one know which can be use as macro. Or the proper method to do it.
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Apr 8, 2008
My design was originally created as a CMYK. Now, it needs to be converted to a Black + one PMS. Using channels, then copying and pasting portions into a new PMS channel, I thought I had it. However, two portions of the design are not looking right, and they were grayscale from the get-go!:
1) The grayscale photo I placed in the design is very washed out and I don't know why. It almost appears like it has hard light on it.
2) The grayscale illy design that I placed in this Photoshop design is also washed out.
It's almost as if the mid-range color (albeit grayscale) has been lost.
Thanks in advance for any advice. I'm placing the design into an InDesign piece, and have half a mind to just delete the photo and graphic from Photoshop, and then bring them in straight into ID.....
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Jul 7, 2009
Is there a way to keep the visual effects of the RGB modes like, multiply, screen, etc. when converting the file to CMYK. All of my images get muddy and I loose the bright colors when converting to CMYK. I know there are colors that a printer can print, but my CMYK files loose their bright colors when converting to CMYK for printers...
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Feb 22, 2008
My problem is that I am converting RGB native images to CMYK and my Key (Black) comes out rich, contains equal levels of CMY and K, instead of true black, only k.
Currently my way around this is to do the standard convert to profile CMYK and with my path selected to the section I would like to be true black simply turn off all CM and Y channels and re-save the image but this is a little labor intensive.
Is there a way that I can go straight from RGB to CMYK and achieve true black without alteration?
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Oct 18, 2012
I have a logo that i wish to conver to pms spot colour as that is what the artwork requirement is, it is currently in CMYK.
I am currently using cs5.
Edit, Edit Colours,Recolour artwork, then i am going to colour books and choosing panatone solid coated.
Now it recolours 80% of the logo but leaves some panels as cmyk. I have come across this on different occasions before.
Is it somthing to do with clipping masks? I hope some Illustrator genius can point me in the right direction.
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May 20, 2011
I have a document which contains around 100 RGB bitmaps arranged in a collage. Now this is going to be printed offset, delivered via pdf with cmyk swopv2 color profile.
Most of the rgb to cmyk converted images look best with relative colormetric as they're fairly close to the cmyk gamut and this maintains the saturation and colors I'm looking for. However, some wider-gamut images look much better with perceptual rendering intent.
Is there any quick way to pick my rendering intent when doing individual bitmap mode conversions in draw, so I can hand select which images are converted using relative colormetric and which using perceptual?
i.e. click one bitmap, menu bitmap, mode, cmyk using perceptual,or menu bitmap, mode, cmyk using relative colormetric?
Right now the quickest way I can seem to achieve this is to manually set the whole color management to perceptual, select by eye and convert those images to cmyk that are well outside the cmyk gamut, then set it back to relative colormetric and generate the pdf cmyk which then makes those rgb images not manually converted while it was set to perceptual be converted via the now set relative colorimetric. It works, but I wish I had more interactive control on the mode conversion bitmap by bitmap.
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Jul 2, 2012
When I use a Pantone color in CS5 and then convert to process, I get certain values for CMYK. However, when I use that same Pantone color in CS6 and convert to process, I get different values for CMYK.
For example, Pantone 2685C converted to process in the both applications yields:
(CS5) C-96, M-100, Y-0, K-10
(CS6) C-90.73, M-100, Y-30.6, K-16.54
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Jan 8, 2014
I have been trying to convert both Pantone Colors to CMYK and CMYK to Pantones on a few of my projects. I walk throught the steps but nothing happens. My counterpart which has CS5.5 also is able to do it both ways just fine. Is there a pre-set someplace that I need to be aware of?
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Mar 21, 2012
I've created some graphic artwork in Photoshop RGB, and now its time to output these graphics to an Illustrator CMYK file.
I have a bunch of layers that I have created for lens flares / light effects and I created these via filling a layer black and then using the Lens Flare Filter and then converting the layer to a Screen layer blend.
I notice that when I convert to CMYK in photoshop I lose the effect of those screen layers, is there anyway I can get those layers to look the same in CMYK without having recreate them from scratch in the CMYK space?
In my illustrator file I have a gradient background and was hoping to bring in these transparent lens flare lighting effects to place over the top of the gradient. I was thinking I might be able to merge the layers in Photoshop but unfortunately I need those screen layers to remain transparent.
I also tried turning the layer to normal 100%, convert to CMYK, placing into my CMYK illustrator file and then changing the layer to screen mode there but its doesnt look the same, its turn transparent like I wanted but it looks like where there is transparency there is a 25% opacity white.
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Jan 8, 2013
I always use CMYK in my designs and the Pantone color codes for their logo design. I have never had to convert them before and have searched forums and boards with no luck in finding an easy way to do this.
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Aug 23, 2012
Recently found another bug in X6. This time it is in the Pantone conversion tables when converting to cmyk. I had a job that had been updated over the years and the file was last used in X5. The colour in question was PMS 7406. The file opened fine & was converted to cmyk and sent to the printer unchecked. What could possibly go wrong - this file had been used countless times before without incident. Pantone 7406 breaks down to 18% magenta and 100% yellow (as per Pantone's own specification). X5 converted it to 17% magenta and 100% yellow. Near enough - I'm not going to quibble over 1%. However, opening the X5 file in X6 caused it to use the 'Pantone previous version' colour table (and you don't get any notification that it is doing it). Result is that it now converts the colour to 18% cyan, 24% magenta and 100% yellow. Where the #@**# did it get the cyan from? We are now talking about a completely different color!
It gets worse. If you create a new object in X6 and fill it with PMS 7406 (using the Pantone + colour table) and then convert it to cmyk, you get 6% cyan, 22% magenta and 100% yellow. Again, this is not the correct break down of this colour. Pantone is a world standard with known conversion to cmyk figures. InDesign can get it right, Illustrator can get it right, then why can't Corel? And how many other Pantone colours are wrong? I have used Draw for 20 years and this is the worst bungle yet (apart from version 4). For a program that tells the world it is a professional program to screw up like this beggars belief.
If we have to check every single Pantone to cmyk conversion against the Pantone specifications, then it just isn't worth using Corel in printing. Add this to the font problems in Font Navigator and the scale error in Barcode Generator and it make X6 pretty much useless in the print industry. Throwing in freebies like fonts, second rate web creators and Photo Paint are not much use when the flagship program is sinking.
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Apr 15, 2013
why change the CMYK values of a color when converting to spot color in a color chart
xmp C 0 M 90 Y 100 K 0
to C0 M 87 Y 89 K 0
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Sep 13, 2012
How can I incorporate CMYK into GIMP?
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Mar 2, 2013
It is my understanding that GIMP doesn't work with that standard, however when I convert something from sRGB into CMYK in another program and save it as a tiff file it appears that I am still able to open that file in GIMP, which then displays it as an sRGB.
Does GIMP 2.8 actually do that or am I not performing the CMYK conversion right?
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Mar 12, 2012
How do you convert a Pantone color to a CMYK color?
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Nov 12, 2012
I am saving my images (assembled in GIMP), exporting as jpgs then converting to pdf pages.My end product needs to be one pdf, so I will be inserting these separate pages into one 44-page pdf.
I need to retain the 300 resolution (actually, somewhere the resolution has slipped to 299.98 which I'm hoping will be so near it'll look fine). (using MacBook OS 10.6.8 with the GIMP 2.8 version)I think for the ebook, the RGB of my GIMP images will be best. So, I've got that, or will have as soon as I do all the export/saving.
(as an alternative, for the paper printed version which will precede the ebook), how do I save the RGB images to CMYK which I understand will print more true to what I'm seeing on my actual paintings > images in GIMP on my computer screen (the two of which look the same at present)? And at what point in these steps is it best to do the new CMYK version?
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Jan 22, 2013
done a modestly complex flyer layout which, by now, should be printed by a professional service. Unfortunately, those would like to have a CMYK PDF image, including an additional layer for a "highlight" color (which should be gold or silver, not sure yet). I've done a bit playing and, so far, am unsure about whether (and/or how) such a kind of pre-print color separation can be done using GIMP, or whether I would have to do this in another way. how to get my xcf stored in a way feasible for this kind of printing?
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Jun 18, 2012
How do I convert to CMYK mode? It is a requirement for a banner I need to get printed.
I go to Image->Mode and select a CMYK profile but it just prints an error'Destinatin Profile is not for FGB color Space' when I press OK.
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Jun 28, 2011
How do you get an image from GIMP to Scribus?
I'm using GIMP 2.6.0 and Scribus 1.3.4
I need to convert to CMYK and do color seperations for print.
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Feb 25, 2011
I am having a Tiff image in RGB which needs to be converted to CMYK. How do I do it? Without loosing the dpi.
Also my publisher is complaining that the image has an alpha channel and has to be removed. How do I do both these ?
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Jul 14, 2013
I had a sudden loss of Photoshop and need to work on a large multi-layered psd. (Had I known in advance I would have reduced the size & layer amount.) Gimp won't open it because it's CMYK.
Tried several conversion techniques to RGB, none worked well. How can I open this file and maintain the layers? Also, there seem to be several different kinds of RGB, what are the differences?
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