Re: grayscale conversion to RGB

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FDanB@aol.com
Date: 02/09/03-01:59:12 PM Z


Jacques said in his message...

>Converting back to grayscale resulted in the changed values in grayscale.
>In order to calibrate and apply curves to images is it advisable to print
>the grayscale image as an RGB file on a desktop printer?

Color Management is messing with your values. Note: Color Management is
generally a good thing...but when it changes your step tablet densities
you will have a more difficult time using the printed step tablet as a
diagnostic tool for creating new curves, etc.

Though there are several ways to prevent the mode-change tone shift, you
might just want to strip off the image profile (Image>Mode>Assign
Profile>Do Not Color Manage). Then when you change modes you won't see
values in your image change.

About printing grayscale or RGB: if you are making the red/orange
spectral density negs, you must print as RGB (how else could you get the
color!). If you are making neutral color negs, you can print a grayscale
image. For either type you usually want to select COLOR in the print
dialog box so all ink nozzles spray.

Hope this helps!

Dan


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