Digital BW, The Print

Thanks for the warning Dan!

I was sceptical, but I did a quick test with a greyscale gradient -- and there
was the gap, just as you said.

Can anyone who understands the innards of Photoshop suggest why it is so?

Peter Marquis-Kyle

----- Original Message -----
From: "Dan Culbertson" <danculb@...>


> Not sure why this happens but I have noticed that some grayscale images that
> I convert to RGB end up with gaps in the shadow end of the luminosity
> histogram immediately after conversion.  Gaps that were not there before
> conversion.   My solution is to convert from grayscale to multichannel,
> create two copies of the original grayscale channel, then convert from
> multichannel to RGB.  If you are using any process that requires you to
> convert your grayscale file to RGB and apply curves, you may want to try
> this additional conversion step - especially if you have noticed any
> posterization happening in the shadows.  Definitely shows up in a print of a
> grayscale gradient converted to RGB with any significant curve manipulation.