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Old 05-30-2011, 01:03 PM   #5
Join Date: Oct 2004
Posts: 9,836

ronald: maybe the color layers are converted to greyscale and given a halftone effect?
You can experiment with this yourself but use a Channel Mixer adjustment layer--click on the "Monochrome" option--rather than using Image > Mode > Greyscale...

What you want to do first is to take a look at the individual channels in the Channels palette to see which one gives you the "best" result and start with that channel in Channel Mixer and then subtract from your base channel (reduce the percentage from 100%) and add to your other channels. The rule of thumb with Channel Mixer is that the sum of all the channels should add up to 100% but I sometimes find that using a higher total percentage can give you a better coverted image--just depends on the image itself so experiment a bit with the percentages.

In general, I find that using Channel Mixer gives me better greyscale results than using Image > Mode > Greyscale.

You may also find that after adding the Channel Mixer adjustment layer, doing either a Levels and/or Curves adjustment layer gives the greyscale that last little tweak...

Using Channel Mixer is one reason why you want to scan your drawing in RGB--of course you will be adding color later but, scanning the original in RGB, gives you greater flexibilty later (as does scanning at 600ppi/dpi)...

Hope that helps...

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