Re: CMYK separations on Adobe Photoshop

>>> mgalanmolina@hotmail.com 10/29/04 5:57 AM >>>
Hi list, there is a easy way, or not easy, to make cmyk separations on
photoshop other than change image mode to cmyk. I want to obtain the
separation channels as layers in order to apply curves over every layer
independently and save it as different files.

Thanks

Manuel, from Spain

Wih an RGB file (e.g., image.psd), open the channels window and select a
channel. For example, select the red channel. Then change the mode to
grayscale and discard the other channels. At this point, ***be sure to
rename the file*** (e.g., image_RED.psd). You now have a grayscale
positive of the Red channel and you have the original file still intact.
 Do the same with the other channels (G+B). Then, using the original
file, change the mode to grayscale (or desaturate the RGB file) and
rename it for the black channel.

Be aware that this set of negatives will be distorted in terms of color
printing characteristics compared to those made using the CMYK mode and
selecting those individual channels for negatives. The info preserved
just isn't the same, but can be interesting nontheless.

Also, why not use the channel mixer (Image-->Adjustments-->Channel Mixer
IIRC) to get the effects you desire in RGB and then switch to CMYK and
print out the separations?

Joe
Received on Fri Oct 29 06:55:20 2004