Re: Custom color-separations in Photoshop?
True. Watching the histogram and then checking the results, merging the layers to see if there are zones not covered by the separations. Then expanding or shrinking the % of each selection accordingly to the correction they need, etc.The one problem with this method I have found is that you have to be careful with some of the filters, because they will clip the highlights or shadows. You have to watch the Histogram when using them.
But this allows you to make your choice on the main colors of the image, or whatever color you want, making a number of selections on your choice.
The fun begins when you print your separations with colors that are different from the originals, making credible images not reproducing the reality.