separate into four spot colours maintaining appearance

Forum|Forum|3 years ago
July 11, 2022
2 replies
493 views

Dear community,

I have a photograph consisting of colours from beige to copper with hints of blue. I would love to separate it into four spot colours (like Pantone P 31-1, 51-16, 100-5, and Black, or so—certainly the software would know to choose better) approximately maintaining the appearance. Is there any way to do that?

Thanks so much

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davescm

Community Expert

Do you mean like this using a gradient map adjustment layer?

You could go on to create channels from a selection based on each colour to create genuine spot colour channels

Dave

Lavitas MacutisAuthor

Inspiring

No. I mean that this image could be composed by a halftone not of C, M, Y and K, but of Pantone P 31-1, 51-16, 100-5, and K instead (or something like that). While the gradient map you describe distributes those colours according to lighness section, an actual separation (the kind that happens when converting an RGB image, or an L*A*B image, into CMYK) would ideally look almost like the RGB I posted. Photoshop (or another engine) would separate, but not into C, M, Y, K, but into P 31-1, 51-16, 100-5, K. That image would have a great amount of P 31-1, a smaller amount of P 100-5, a still smaller amount of K, and tiny hints of P 51-16 (the blueish).

davescm

Community Expert

I'm not aware of a way.

You can use multichannel to create the spot channels but I don't think you will find an automated way to separate the image and maintain the colours (if the image colours can even be maintained within the gamut of those inks)

Dave