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Channels in PS 5

adding spot colors to PS

The Question:
How to make an image with 5 chanels or more ?
:
How to make an image with 5 chanels or more ? How to make a selected space in the image with a spot color?
Our reply to a question sent in by: Sherif Wahib
 
In Photoshop 5, 5.5, "spot" color channels must be added to a CMYK color mode file.

Spot Color via the Channels Palette OPTIONS pull-out menu. This opens the Channel Options dialog where the last check box item is "Spot Color."
  • At the bottom of the dialog is a color chip (sample) where you designate what your spot color will be. (Click it, and open color selector (picker)
  • From an ordinary layer, make object for spot color a SELECTION, and then SAVE the SELECTION to an Alpha Channel. (Select > Save Selection)
  • Now select the channel, and utilize the Channel Options (as above) to set color, etc.
Remember Caution:
If you are imaging the file to negatives for four color reproduction, this spot channel will generate an additional negative in addition to the CMYK negatives. Make sure this is what you want.
 
Let us know how this worked out for you.
Same answer, different question:
Then Eric wrote in saying:
   "I'm printing a letterhead designed in two colours (red & blue)... I'm finding it difficult to seperate the two colours for the printing press. Can you help?"
 
Same principle as the above "Spot color" solution.
   Once you have your design finished you need to get the file down to two colors. It would probably be best to make them both spot colors and have the CYMK channels be blank, no content. When you image it to film you should get two characteristic negatives.
   A good policy is to always get the inside scoop from the service bureau or the printer. Some might even say don't worry about separating it -- we'll take care of that. Which is what I like to hear!
 
From Photoshop 911 Case #0211-02
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