: How do I ensure that my greys don't have a colour sheen when printed from Photoshop? I have designed a Photoshop flyer (CMYK, 16 bit) and have a grey background, some black & white pictures

@Heady304

In my experience, there are two major causes of this, and both boil down to a difference between RGB and CMYK output since even a CMYK image MUST be displayed on a monitor using RGB. First, if the grey tone isn't neutral to begin with (by having too much cyan in the CMYK mix, for example) it will show in the print. The second cause may be ICC profiles. ICC profiles are data sets employed by most printers (whether they realize it or not) which are designed to massage the output values of an print image based on the theoretical output profile of a given device. Properly used, they can be a wonderful means to consistent color. Otherwise they can be an infuriating obstacle. Ask your printer what output profile is being used. If it isn't a device-specific profile, it will probably be something generic like "US SWOP Coated V2". Once you know what his output profile is, you should assign an appropriate monitor ICC profile for your monitor. A very common pairing for Swop V2 is Adobe RGB 1998. That would be a good start if you can't determine a better match on your own. Note that ICC profiles are employed a little differently between Photoshop, Illustrator and InDesign, and they can be overridden by the output process. Communicate with your printer and do your research on how to use them properly.

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@Ogunnowo857

Make sure when you select the gray Color not to include any colors in it .. let it black only .. it must not appear in other colors channels. this will ensure the gay will be pure gray.

they gray you must use is something like that

Cyan:0% Magenta:0% Yellow:0% Black:50% for example

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@Dunderdale640

Note down the CMYK color code of the grey color you have used in the flyer. Give it to the printing guy and ask him to specify the CMYK color code before printing it. As CMYK is readable well in print, it should work here as well.

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