: What CMYK values should I use for the brightest highlights in an image? I usually set the whitest part of the image to C5 M4 Y4 K0, but this is making some product shots of glassware (ie

@Hamaas979

I usually set whitest part by re-defining the default values for Curves white point eyedropper. Just double click on the eyedropper icon and you're able to enter your own values. You will be able to click on the white area of the image and the CMYK values will be set to the necessary ones with just one click.

If the image looks gray we can correct it by of midtones (as on the picture below). It's RGB file, so the curve should go down for CMYK.

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@Murphy569

I ended up doing this:


Used the Dodge tools (midtones) to remove any grey in the glass area
Curve adjustment to remove any grey from the thicker parts of the glass, ie sides and bottom of the glass
Eyedropper on the normal glass area in the middle and Levels adjustment to make this 5/4/4/0
Added a line of reflection in the left of the glass and made this a lighter, ie a spectacular highlight with 0/0/0/0 on some images


I did find a mention of making this 3/2/2/0 as well via a printer's website, but I'm going to keep with my mix.

Here's a before and after:

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