spots of pantone color on black and white photo?

A
Posted By
adunate
Jul 28, 2008
Views
500
Replies
7
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Closed
Is it possible to create a spot of Pantone color on a black and white photo? I did my example with the channel mixer and a history brush, however it’s in cmyk. Can I get the red into a Pantone so I have a 2-color photo?

<http://www.adunate.com/flying_jason.jpg>
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black black and white color pantone spot white

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AS
Ann_Shelbourne
Jul 28, 2008
You need a Grayscale with an additional Spot Color Channel.
A
adunate
Jul 28, 2008
Thanks. How do I do this?
MO
Mike_Ornellas
Jul 28, 2008
look in the help menu under CMYK and Grayscale and Spot colors within the application of Photoshop.
A
adunate
Jul 31, 2008
I understand how to convert my image from CMYK to Pantone, however, I’d like to convert just the one color to Pantone, while leaving the rest of the image as greyscale.

I cannot find instruction on how to do this. Anyone?
MO
Mike_Ornellas
Jul 31, 2008
Just copy the information that you want from the grayscale image into the Spot channel.
AS
Ann_Shelbourne
Jul 31, 2008
… and, if you don’t want the Spot color to Overprint, knock out that part of the image from the Grayscale channel — but remember to leave a sufficient Trap.
AR
alan_ruta
Jul 31, 2008
FYI (just in case) the trapping thing can be (IMHO) a bit tricky. If you have a perfect mask then you need to min or max the cmyk and/or spot a pixel or two. Also the amount of pixels depends on your effective resolution, e.g. 1 pixel at 300 dpi, placed at 100% should be good. However if the image is placed at 30 percent or has a rez of 400 or 600dpi the number change.

alan

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