Photoshop :: Rich Black When Converting RGB To CMYK
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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Jan 18, 2014
I've had this problem before, and it randomly popped up again today.
This time restarting Ai fixed the issue the first time. I just don't know if this was human-error/setting on my end, or a minor bug to report.
So I create a CMYK Ai doc. Create some black text and/or shapes. Then decide to change color to rich black by manually entering CMYK values (in this case, 60, 40, 40, 90), select ok. However, the colors revert back to original percentages (75, 68, 67, 90).
In past versions, it's happened once or twice, and restarting Ai didn't solve the first time.
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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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Jun 3, 2009
win xp CS2 We have tif files of drawings placed in a ID publication. Our printer has informed me that the drawings, which are basic line drawing wtih a color panel behind, are constructed of 100% of all four colors and therefore too much ink for the press to handle. The printer wants the black converted to a rich blk (40, 20, 10, 100)Is there a easy clean way of doing this? I suspect it's something in the channel pallette. Your thoughts?
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Apr 27, 2012
A client has asked a question that seems strange to me regarding rich blacks in images. They want to be able to change blacks in an image that might be 80 80 80 100 to 30 30 30 100. My thought would be that they would just change the ink limit to what the printer has recommended. They could also reduce the black value in curves, but to get their limits would look strange. Before I go back and state my opinion, I would love to hear from some printers to see if they have any other opinions. They are not trying to mix colours to put them into InDesign.
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Jul 2, 2013
I am having a bumper sticker printed in mass quantities. The sticker is black with with large white text. My problem started when I exported my ai file to a PDF and the black came out gray. I then exported as a jpeg and found the same grey result. After searching online I found that pure black is not 100K, and it seems to be a mixture of all the CMYK colors. Well I adjusted the colors to make a rich black blend and when I saved it as a jpeg the black displayed as intended. However when i exported the same ai file as a PDF the black still looks grey. Will the pdf print pure black even though it doesnt display that way on screen?
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Oct 2, 2013
Art brushes are showing a grey version of what should be a Rich Black RGB 0, 0, 0,. Furthermore, expanding the art brush stroke and sampling the color shows the strokes "Black" is actually: 32,32,32, pre-expansion the RGB sample shows the stroke is 0,0,0.
Color Mode=RGB
Print Proof=NO
Document =RGB
Display all Blacks, print all Blacks=Rich Black
Options for Art Brush show art brush swatch is Rich Black but using eyedropper (within brush options window) and sampling preview stroke CHANGES swatch preview from Rich Black to Grey.
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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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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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Aug 30, 2012
Alright, I have a grunge vector I'm using in an opacity mask over my shapes. I need to convert my .eps grunge vector to full black, if I dont then the end result looks fine in illustrator...but when brought into PS you can still see light pieces of the object that the grunge was supposed to mask out.
When I click the eps file and use %100 black: instead of filling the grunge bits to black, it fills the entire selection black so I end up with a big black box, and if I use the stroke, it outlines the box itself. I tried making a compound path and also expanding the grunge, then retrying but no dice. Does AI recognize this eps file as one big square selection?
How do I get my .eps grunge vector %100 black rather than the CMYK black?
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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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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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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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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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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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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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Mar 17, 2008
I'm drawing cartoons in black & white for a publication. I've been told that I must make the black 100% and the CMY 0%. After I scan the image I convert it from RGB to CYMK mode but I can see in the channel's palette that it has colors mixed into the black. If clear the CMY channels it image loses detail. I've also desaturated the image but it doesn't seem to do anything.
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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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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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Sep 14, 2012
I have some crosswords that have been exported as CMYK but not just 0 0 0 100, a mixture of colors, something like 2 13 2 100 or whatever. How can I change the black throughout in Photoshop and save?
The printer have of course told me that it needs to be on the one plate.
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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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Jan 19, 2011
While designing an album cover...
Album booklet to be printed in CMYK, obviously. I have an RGB photo, mostly black. After converting it to CMYK and using the channel mixer to return to the original brilliance, the black is CMYK 100-92-85-98. This is obviously too long of a black... way too much ink... using thin white fonts over it prints terrible, etc. How do I adjust the black of the image to something more favorable to printing, like 60-40-40-100?
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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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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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Jul 3, 2013
I need to change my greyscale color settings to CMYK black, where in CC do I find the profiles to load?
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