Photoshop :: Printing In RGB Vs CMYK
Dec 17, 2012
There is a photo that I've downloaded from the internet that I'm printing and using for a class project. It was supposed to be Black & White, but when I first printed it, it looked sepia.
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My teacher suggested I add a Black and White adjustment layer, but since the photo was originally in Gray scale, I needed to make it RGB to do that. Once I did, the Black & White adjustment layer made the photo Black & White.
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Since I want to ultimately use the photo printed, I was thinking it would make sense to make it CMYK. When I try to make that change, Photoshop says it will discard the Black & White adjustment layer. Does that mean it will go back to looking like sepia when I print it? Does it even make a difference if I change the mode to CMYK for printing?
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Also, is it better to wait and add the Black and White adjustment layer only after I've made all other adjustments as the last step before printing. Or better to do it right away so I know what I'm working with when it's Black & White?
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Finally, is it best to wait and add type only once all the adjustments have been made to the photo? Does type lose any resolution when it gets merged into other layers?
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Feb 14, 2003
If I want accurate colour reproduction whilst printing onto paper, should I be in CMYK or RGB mode?
Does it even matter and what's the difference?
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Oct 5, 2008
I've created a satire newspaper in photoshop and when I sent it (saved as pdf) to the printers they asked for all black colours to be saved as CMYK.
I created the whole newspaper in RGB, is there an easy way to change it all to CMYK? Is it even possible in photoshop?
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Jul 1, 2013
I'm adapting a printer to print various conductive inks and such, however I need to ensure it only prints one 'colour' at a time. Is there a program that lets me print *just* from the magenta cartridge or *just* from the cyan, with zero mixing? I need a program that lets me do this and ideally I can input those values correctly.
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Feb 13, 2008
I've been using Photoshop
This is my problem:
I'm trying to publish a magazine for my community, and I'm using Photoshop CS3 to design the magazine. From what I know about printers and printing presses, they print using CMYK - therefore when I create my documents I've been using the CMYK 8 bit Color Mode. My resolution is set at the 300 pixels/inch, but I'm not sure what my Color Profie/Pixel Aspect Ratio should be.
I've also been told that most printing companies prefer PDF documents, and I don't know the right options to choose when saving my PSD's as PDF's through Photoshop.
I noticed my first problem when printing a sample at Kinko's. I had mostly black and white on my image, but I had a light yellow to dark yellow gradient as a background, and when it printed, banding appeared towards the lower part of the page where it should have been dark yellow. Basically that gradient wasn't smooth. I also noticed this on my computer when using a CMYK Color Mode, but it was less subtle (when I use RGB, the gradients are perfectly smooth from light to dark).
The sample I took to Kinko's was a:
Flattened image,
Then saved as a Photoshop PDF
As a Copy
ICC Profile: U.S. Web Coated (SWOP) v2
I just need to know the right options to start my image, and the right options to save my image as a PDF to ensure the best print quality with no sacrifce to color, gradients, etc.
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Jun 29, 2013
Since yesterday all of a sudden my OKI color printer shows white areas in a sandy color, when I use CMYK as color modes. Other colors are shown in false colors, too. This effect is also shown in print preview, what means for me, it´s not a printer issue.
Refilling areas with colors in RGB works, but I don´t want to live with this workaround. Nearly all my Corel graphics are made using CMYK.
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Dec 9, 2013
Is there a way to print the entire CMYK coated palette. There has to be a way so that i can reference my swatch book against my actual print.
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Oct 18, 2012
How to prepare for CMYK Final Job  in CDR X5 for Multicolor Printing.
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Feb 2, 2013
Ideal color settings for exporting .jpg and .eps files for CMYK printing? The default X6 settings result in rather washed out looking exports (both on the screen and on the prints). Black looks very dark grey etc.
Never had this issue with X3 but I understand that X6 uses a totally different color engine so I figure I just need to know the correct settings.
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Dec 21, 2011
corel.jpg
I have a problem with the color management of my corel Photo Paint X4.I create Flyer in CMYK and the color management is set as you can see in the attachment.On screen all colors are correct, but when i print something the colors look like it ignores the color management settings for the printer.
When i open the same document in my old Photo Paint 10 with the same color management settingsthe printing has the right colors...
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Nov 11, 2012
This discussion is on using RGB file creation techniques to output to ink jet devices. I posted the comments below the link because color management off always pops up in the conversation as it turns to non-postscript devices so I wanted to circumvent the side bar conversation.
[URL]....
First let's get this straight, I've written it and said it about a thousand times, you cannot turn off color management.
When you select simulate color management off in the default application color management dialog, CorelDRAW simply utilizes a different set of color management settings. The rules of color management never change!  The application requires guidelines on color and still must have rules that govern conversions, PERIOD.
These rules are not different, only the engines, rendering intents and profiles change. These setting in X5 and X6 can be, in some cases adjusted to simulate previous setting in versions prior to X5 that were labeled color management off, but this label in older versions (X4 and older)Â were deceptive in their nature, color management was never turned off, just set to a specific configuration.
Simulate color management off (in X5/X6) uses wide gamut cmyk simulation as the CMYK profile, it disengages the color engines (setting CorelDRAW to another internally controlled process)Â and sets the interface to RGB. It does not turn color management off.
These settings have many uses for industries such as laser engraving and screen printing separations and I support their continued use. Do not confuse this and use these settings for professional output using press work, ink jets or digital printers.
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Feb 10, 2013
My printer told me to add 5% C 5% M and 5%Y to my 100%k channels as without it I can see the black comes out a little/touch fury on things like small thin text.
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Is this the same on all other colors too? Eg. say 100% Cyan color, should I add 5% M, Y and K?
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May 10, 2011
Having an issue with CMYK 100%-K value getting reconfigured on PDF/X-3: 2003 (ISO 15930-6) CMYK Export to values like:
C - 74.06%
M - 68.29%
Y - 66.57%
K - 89.83%
When working in the xar file, the CMYK for black is:
C - 0%
M - 0%
Y - 0%
K - 100%
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Oct 2, 2006
i have an image that is 28' wide by 60' high. i have to tile print it, but i have to print it out on film (see thru acetate). it has to be able to print at 1400 dpi. i know how to print at 1400 dpi on adobe photoshop, but i dont know how to tile print on that program. i have the image now in illusrtator, because it lets me tile, but i cant get it to print out for film (1400 dpi). im using a epson 1280 printer.
i really need to be able to tile print this in high resolution on film. anyone know what i can do??
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Oct 30, 2012
How do I convert the colour profile of a Lightroom custom printing package from Adobe Prophoto to sRGB before printing? For that matter, how do I save the thing? I have no interest in saving the template, or the collection separately, since neither has any use without the other. And without saving them as one finished item, I have no way to convert the colour profile of that item. I can see clearly from the appearance of the print preview that the above mentioned colour profile conversion is required.
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Feb 18, 2012
I am using AI and PS CS5.I have an eps in AI that is set for RGB. The colors are how I want them.
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When I open the same eps in PS, PS thinks the file is CMYK. Whether I open the file as CMYK and convert to RGB or open at RGB, the colors shift. If I leave the file as CMYK, the colors are shifted.
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I can confirm that when I convert the file in AI from RGB to CMYK, I can see the color shift. If I leave the file as RGB in AI, it looks how I want.cannot get the file to show in PS as the same color as what I see in AI.I have confirmed that both AI and PS have color settings set to NA GP2.
[URL]...
Basically, the file with AI in RGB mode looks how I want. The file with AI in CMYK mode looks different.In PS, both RGB and CMYK color mode are the same as CMYK in AI. am not sure why PS does not show the RGB colors like AI does.PS CS5 and AI CS5 are synched:{URL]...
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Feb 10, 2005
I've been creating book covers in paint shop pro 8. I create the covers from images that I get from my customers, and then send them off to a printer to be printed. On a couple of occasions, the printer people have came back and told me my cover is created in "rich" black. I think they mean the CMYK value is 100% for all 4 colors. They won't accept that. My question is, in photoshop, is there a way once I receive an image to check and see what the CMYK value of that image is, and if so, fix potential problems as described above? It doesn't appear I can in paint shop pro. I have been looking for a good reason to purchase photoshop anyway since I'm sure its a much better graphics program.
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Jun 2, 2008
I have just started using Photoshop CS3 amending photos and adding text & graphic for printing. The photos start off in RGB but when I get them printed in CMYK they look dark and terrible! how to handle the transition of photos from RGB to CMYK and how to avoid making them darker/destroying the quality?
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May 9, 2009
I was give an image in RGB to put onto my own image which is CMYK. Now that I have spent an hour color matching it, when I go to cut and paste it only one part of it at a time comes over and it looks awful.
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May 7, 2008
I have set up 2 a2 architecxture presentation boards in photoshop in rgb, have come to print them and the colours are a lot more acidy and bright than on screen.
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Sep 3, 2007
I have a flattened .psd file with significant areas of contaminated black that needs to be changed to key color black. The problem is that the color mode was changed from RGB to CMYK at the last minute after the file was flattened and saved, so now I'm stuck with large black areas that are not PANTONE process black, but are 90% K with varying levels of CM and Y. I need to replace the large impure black swaths of my file with true key color black without compromising the quality of the file to ensure the project succeeds.
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Apr 12, 2009
I just created the background of a business card in photoshop, it's pretty complex, using lime green as one the main colors.
FORGOT TO CONVERT IT CMYK before I started.Â
When I convert it to CMYK it gets very dark and doesn't look at all like it does in RGB.....
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Apr 29, 2006
I sometimes Export a vector image with a text I put on, from Illustrator to PS. I do that because I want to work some more on it. However, I'm not sure whether to Export as CMYK or RGB. I have been told that there are more options for working on an image, if it's RGB, it that true? Mostly, I want to do some effects on the text.
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Aug 2, 2004
keeping the bright colors of RGB intact when converting to CMYK?
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Jan 31, 2006
I've done my work in Illustrator, I want to take it to Photoshop. If I drag it from Illustrator (CMYK) to a blank document in Photoshop, should the blank document be in RGB or CMYK?
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Aug 28, 2006
I have a folder of images, some in RGB, some in CMYK. I want them all to be in RGB so I'm running a batch action on them with a conditional mode change. So, if a file is in CMYK, it is changed to RGB.
But if a file is already in RGB, I get this annoying alert, telling me "Mode of the document is the same as the target mode. No conversion performed."
Well, of course. I don't expect it to be converted. That's why I chose CONDITIONAL mode change! I don't want to have to hold PS's hand through this batch but it's making me sit through the conversion of hundreds of files simply so I can say okay that it's doing what I asked it to do.
I've checked the "suppress color profile warnings" box and told it to log errors to a file (i.e not to stop) but I'm still getting the alert.
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Mar 26, 2003
I have Photoshop 6 and am trying to convert my company logo over to CMYK from RGB. The problem: I have it exactly the way I want it (colors) and try to switch it over and the color green in my logo is not the color I need.
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Apr 28, 2009
This is probably a hoary old subject but I've found surprisingly little help via Google, etc. I just finished creating the background for a large map, with over a dozen RGB layers, most with masks, a number of adjustment layers and some alpha channels. I've heard that for CMYK output it's best to work in RGB and convert to CMYK at the last minute, and colour correct in CMYK. That made sense to me for a number of intuitive reasons, but now I'm writing up the metadata and I want to give factual reasons to do this, not just my assumptions.
Obviously file size is one. It took 5 minutes to open or save this RGB file, CMYK could have taken 33% longer. Can anyone tell me how the math is done in PhotoShop? I'm wondering about the blending of all those layers with different blending modes, transparency, adjustment layers etc. In my map each pixel must have gone through a dozen or more math operations.   Will RGB, with it's 255 levels, be more accurate than CMYK with its 100 levels, or is the math all done in double precision and rounded at the end, or is the math all done in LAB or some other colour space?
Also, I recall encountering some PhotoShop operations that were greyed out in CMYK. I tried to discover them today on a test file but drew a blank. Can anyone think of any? Any other pros and cons to RGB over CMYK? Andy PS: This forum software is unbelievable. Hard to believe Adobe would have something so clunky. Like they're actively discouraging the use of their forums.
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May 3, 2013
I have a many layered PSD. The tab says RGB/8/CMYK? I didn't think you can mix color space?
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Now the big question. Any way to determine which layer is CMYK? I'd like to convert it or remove it? It could have been a placed PDF?
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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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Jan 14, 2013
I have used the digital color meter in apples os to find rgb colors in a image. I was trying to find one that would give me the closest cmyk equvelent to the web color on my clients site.Â
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The problem is that i used a hex value in Photoshop to create the colors on a bizcard. but all of them came out darker that desired. This is the second time it has happened. I am starting to believe that hex values and cmyk are not friends.
I do not have 500+ dollar for a new screen. I own a LG 2750 that was as close to an apple monitor ad i could see (compared with the naked eye and some gradients as a baseline). This monitor makes everything look brighter than it is so i compensat for that by making things slightly brighter than what my eye preceves is right. My othe screen is its opposite, making every thing darker.
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This why i was needing a meter that would allow me to see the cmyk formula for the pixel i am hovering over. I would also wnat it to tell me whether this was a already a native cmyk formula (native to its range) or if it was just a closest estimation.
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