Digital BW, The Print

Perhaps it would help if I am more explicit about what I am seeing/doing.  I
copy the red and then green layers to the blue doc, duplicate the blue
background layer and rename it blue, and then delete the background layer so
that I end up with a doc with 3 layers only (no background): blue, red,
green from bottom to top.  When I view the layers one by one I note that
they are very different.  I can see the impact to the doc if I select just
the blue to be visible and then click to add the visibility of the red and
green.  I see no change to the doc if I subtract the visibility of layers
under the green (ie turning off first red then blue) unless green (the top
layer) is less than 100%.  So really the red and blue channels are being
allowed to only play a very small part ­ and then only if green is less than
100%.  Am I just doing something wrong here?


From: stevekale@...
Reply-To: DigitalBlackandWhiteThePrint@yahoogroups.com
Date: Wed, 17 Dec 2003 16:25:43 -0000
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] Split channels B&W conversion

I would like to thank Mitch for his tutorial on using Split Channels to
convert to B&W.  
This certainly seems to be a very powerful method and one that I intend to
use from 
now on.  As I explore this method I would very much appreciate a number of
very 
basic pointers.  Mitch has mentioned in a posting here that 5-10% for Blue,
65-80% 
for Red and 90-100% for Green provides him with good initial results.  In
his tutorial 
he mentions using Pin light on the Blue channel to provide greater contrast.
I know 
this is a massively broad question but could someone help me along my way by
telling me what to expect from increasing/decreasing the % of a particular
colour 
channel and changing the type of blend mode for a layer.  I know this delves
into the 
heart of using PS but I am torn between having to methodically study how to
use PS 
better and getting good use out of it now.

Thanks in advance

Steve

PS:  Alan also mentioned copying the Luminosity channel after a conversion
to LAB 
colour and using this also.  I assume he meant the Lightness channel.  Any
suggestions for weighting/inclusion of this also?



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