CMYK Soft Proofing doesn't work

[Grum999]

@cat_938376

Here is the screenshot: https://imgur.com/a/gBPKxYO

Do not use “Chemical proof”
It’s not a good color profile for CMYK conversion.

@tiar

If you create a document in CMYK Chemical Proof thinking that it will improve your life in any way, you’re going to be very disappointed. 1) This is most probably incorrect color profile, so the colors will look wrong when printed out. Or there will still be a conversion done (if your printer or printing company is not terrible), which means there is no point in starting from CMYK… 2) Even if it was a correct profile or if you use a correct color profile, there is a high chance that if you want to print it in a different company or on a different printer, you’ll need just another color profile, which will lead to more color quality loss. Meanwhile you could’ve just worked on a bigger gamut, sRGB (sure, typical CMYK has some colors that sRGB doesn’t have but it’s generally a bit bigger - plus is suitable for showing it off of the internet and is easier to work with…) or maybe even bigger (though then you’d need bigger bit depth too).

If you absolutely want to manage CMYK conversion by yourself, use the color profile expected by the printer (your print shop must be able to tell you which one to use)

After, why the soft proofing doesn’t work on your side it’s hard to say, tested on my side I can see difference on document with and without softproofing (with “Chemical proof”) but it should be easier to see it on a document with saturated colors like this one:

Activate soft proofing in this document, do you a see a difference?

Grum999