Converting images from RGB to CMYK // Photoshop

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Today let’s look at how to convert RGB to CYMK in Photoshop! This process would be needed to send imagery to a commercial printer. This applies to any images that are within artwork or as an independent image. It’s a super simple process but can help avoid any nasty surprises when you receive your prints from the printer.

Also, it’s a good drinking game to count how many times I can say RGB in one video!

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3:30 to skip intro/ info. It is however well explained and useful.

jeffreychanta

That's all great. However, I save my psd in CMYK, then export the image to have a CMYK image. But when open that exported image in Photoshop, in order to check the color profile, it's RGB again. What am I doing wrong? :(

teavetyskova

If I provide my artwork in RGB including my non-image artwork, when the printer converts the RGB files to CMYK using their color-calibrated profiles for their press, they will have the full spectrum of RGB gamut to use to approximate color reproduction. This is UNDOUBTEDLY going to produce OPTIMIZED printed colors because the printer profiles are designed to work specifically with their presses.

If I convert my artwork to CMYK and work in the CMYK colorspace, It's still an RGB color space on the screen. It is now converting the CMYK back to RGB to display it. But there's no gamut loss in that direction.

However, when I send CMYK Artwork to the printer and my images use a different color profile than the printer uses, the printer has to convert my version of CMYK with it's limited gamut to their version of CMYK with a potentially different gamut thereby ensuring that more color loss will happen. I'm providing smaller gamut CMKY documents that then get converted to optimized CMYK which has the potential to limit even more gamut. It will NEVER produce improved gamut. or color reproduction.

The only time that it is reasonable to convert your ProRGB or SRGB or RGB images to CMYK is if you have the predefined optimized press profiles provided by the printer. This should be done as the final production step thereby optimizing your gamut with only one compatible color conversion.

However, if I produce my artwork in the same color space, sRGB for example, then provide the much higher gamut file to the printer, THEY WILL OPTIMIZE THE sRGB colors to output the best quality color reproduction based on their press profiles. It may not look like the screen, but it will produce better color output with higher gamut.

To prove this is true, simply take a sheet of photos that you compile from your iPhone in ProRGB colorspace and submit them directly to the printer to reproduce the colors. They will take the high gamut files and apply the corrections to convert to CMYK based on their presses.

next, take the same file and convert it to Generic CMYK Color Space and send it to the printer as well. The printer will then convert it to their color profiles, output the plates and generate the prints.

The RGB files will produce better quality color reproduction because the conversion happens once using the highest available gamut. The CMYK files will provide lower gamut sources and still have some color loss when converting to press optimized CMYK. It's double-lossy color repoduction.

Printers that like CMYK artwork like it not because it produces better quality prints but rather because then they aren't responsible when your prints suck. They can blame your color conversions. You provided us with the color separations, we just used what you gave us.

And this doesn't even account for the problems you face if the printer used is a 5-8 color printer. Converting from limited gamut CMYK to 8 colors provides NO BENEFIT IN GAMUT when converting up. However, RGB - > 8 color process will still not produce the full RGB Gamut, but it will produce a shit-ton more colors than CMYK Generic Profile to 8-color printer optimized profiles.

JasonBurnettsProfile

How the literal f**k do you not have any more subscribers. Precise, communicative, thank you!

JackRoseTravels

Hi Rob!
Congrats for the great tutorial. I have a little tip for the dull colors: if you convert the RGB profile from sRGB IEC61966-2.1 to Adobe RGB then it will brighten the image and gives more saturation. After that you can convert to CMYK and then the image will remain more contrasting and saturated. I always do this method and CMYK photos will have more 'life' in the final result.

vakulyagabor

Thank you so much for this wonderful video. as self taught artist, printing my artwork is pain. but thank you for your video, I will try this CMYK format. :)

Rashmisillustration

I always love clear and intelligent tutorials - and this is certainly one of them! I am subscribing to your channel. :)

Martincohenphoto

I have an HP Latex printer and always print in Adobe 1998 RGB using ONYX. Colors come out amazing. Never had a problem. I design in RGB too.

blueghost

Thanks a lot for the video Rob, helped a ton!

ShiraszMohamed

The discussion of a "calibrated screen" around 7:00 is hilarious. A "calibrated screen" is not simply a product you buy. It is an action that any graphic professional should perform with a colorimeter. You can calibrate a MacBook and a 300 pound laptop display as well.

JamesOblak

Loved this! So easy to watch and learn from

sharondarko-mensah

Hi Rob: I am new to printing via a commercial printer. This video was very detailed and provided a great explanation of CMYK. Cheers, Keith

keithpinn