Take your greyscale image and convert it to sRGB. It'll be in "color" like
the lab needs but the only colors present will be shades of grey. I do this
all the time and it works. You can also tone the image once you convert it
to sRGB.
--
Chris Crawford
Photography & Graphic Design
Fort Wayne, Indiana
http://www.chriscrawfordphoto.com My portfolio
http://blog.chriscrawfordphoto.com My latest work!
http://www.plumpatrin.com Something the world NEEDS.
On 8/21/08 7:40 AM, "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> This is really a PS CS3 question (I think) but it's related to
> commercially printed B&W images.
>
> Until a couple of days ago I had never attempted to have digital B&W
> prints done by a commercial lab. I had taken a lot of photographs of an
> extended family which required a moderately large number of prints. For
> one of the sub-family groups I got a specific request for B&W. When
> processing the raw file in CS3 I converted to grayscale using CS3's
> wonderful set of color sliders which is like having an infinite variety
> of color filters. After conversion to grayscale I noticed that a patch
> of dappled sunlight on the father's forehead looked more like a horrible
> skin disease than dappled sunlight so I spent some time touching up the
> grayscale version to make him look more natural.
>
> Then I uploaded all the images to mpix.com for printing. Much to my
> surprise the B&W images displayed as totally corrupted after the upload.
> The image was not actually corrupted but the display software assumes
> that it's displaying an RGB image and doesn't even recognize grayscale
> JPEGs. Now I knew that MPix (as do most commercial labs) only supports
> sRGB for color prints. What I didn't realize is that the same pertains
> to digital B&W. They'll print as B&W on Ilford digital B&W paper but
> only from an sRGB image.
>
> Bummer. I had to go back to the original color version to do the
> retouching and resend the image as sRGB. But the worst part is that I
> lost all of the subtle tonal variations I had introduced in the original
> grayscale conversion using CS3's color slider controls.
>
> So, the question is: How could I have maintained the effect of CS3's
> grayscale conversion while retaining the full color image? Is it possible?
>
> Chuck Norcutt
>
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