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How To Preserve Spot Colors in Photoshop (version 6 and higher)
How To Preserve Spot Colors in Photoshop
(vs. 6 and higher)
written by Elisabetta Bruno
4. Trapping
Go to Select > Inverse to inverse the selection. Make sure you have selected the spot channel and press delete or backspace to clear everything outside the star. You should be left with a black star now.
Go to Select > Inverse again in get back your original selection. Now click on the CMYK thumbnail so that all of the CMYK channels show up again and hide your spot channel. Make sure you still have your star selection active. Press delete or backspace to delete the star. Now make your spot channel visible again. Et voila! Your star is now Pantone Orange 021 C.
You might notice that the there is some very tiny space with no color between the borders of the star and the ones of the other shapes. If that is the case, then it might show up when you print your file. So hide all of your CMYK channels again and make sure that only your spot channel is visible.
Your star will turn black again. You can simply select it with your Magic Wand. Now, go to Select > Modify > Expand.
When the Expand Selection window shows up, type in the number 1 in the Expand by: _ pixels field. Press OK.
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