: Why doesn't the Pantone Color Finder use same preview color for Coated and Uncoated? Coated and Uncoated versions of the same Pantone color, if printed on the right paper, should (approximately)

@Speyer780

Correct.

The problem is, that they are actually the same ink, they're just labeled differently so as to afford having a more "accurate" preview, with the assumption being that everyone will always use the correct ink/paper, and that there will never be a need to do a read-across or use two different stocks in a particular job. The correct thing to do would be to have page layout programs which would require one to specify a paper, then simulate overlaying it with ink, and select an RGB representation based on the combination of those two properties.

I miss Cerilica's Truism (which was a page layout app which worked thus).

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@Kevin459

A coated Pantone® sample does look different than an uncoated Pantone®. I guess if you'd never seen it in person that this might be hard to imagine. If you can get your hands on an actual color book you'll see why that is.

Edit: I'm going to add this because it might help people understand in more detail Look at the answer by
go-junta and the picture provided. How do Pantone coated and uncoated colors relate?



I'm going to quote the last bit of their answer


"Printing on uncoated stock generally requires more ink because the
stock is more absorbent. If you have a look at ink sellers, you will
notice their ink estimator will give you different results for the
same quantity of prints; less ink for coated, more ink for uncoated."

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@Cugini998

Because they do not produce the same measured color.

The aim of your production tool is to simulate what happens on paper. Computers deal with facts so approximately is not the same. Without this info the simulator can not produce an accurate simulation. (wheter or not your monitor can do this is irrelevant. If the system does not have this info then it can not even begin to serve its purpose)

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