Using grayscale and color - Graphics

Dave Kelly wrote:

> I gave an image that I need to get ready to send to the printers. It can
> just as well be printed in shades of black as it can in shades of brown.
>
> When I got Image > Mode > Grayscale and click the image turns gray.
>
> When I try to impose a the international sign for NO, red circle with
> diagnal line, the red in now gray. Is there a way to keep the background
> gray and the circle red in one image.

Don't use greyscale if you want color in the image. Greyscale
is just that.. No color. You want to keep the image in color.

You can desaturate the image by using:

Layers -> Colors -> Hue-Saturation.

Once you have the Hue-Saturation dialog box open, drag the Saturation
slider all the way to the left.

That will convert the image to black and white.. Now you can draw
your symbol on the image and it will be red. The best way to do it
would be create a new layer and draw the symbol on that.....

Dave Kelly <daveekelly@earthlink.net>, you wrote on Wed, 12 Oct 2005
20:45:14 GMT:

>I gave an image that I need to get ready to send to the printers. It can
> just as well be printed in shades of black as it can in shades of brown.
>
>When I got Image > Mode > Grayscale and click the image turns gray.
>
>When I try to impose a the international sign for NO, red circle with
>diagnal line, the red in now gray. Is there a way to keep the background
>gray and the circle red in one image.
>
>Or since I am sending this out to the printers, send 2 seperate images.
>One of the bacground in grays and one of the red circle and let the
>printer impose the one atop the other.

I would check with the printer's and ask them what they prefer. Both
methods should be fine, though.

As for mixing red with grays, you'll need image mode RGB. Either
switch back to RGB after you've gone to Grays, or use another method
to desaturate.

The different methods have differing results though.
<http://gug.sunsite.dk/docs/Grokking-the-GIMP-v1.0/node54.html> has an
excellent overview of how to get certain distributions of lightness.
The explanation may seem a bit technical, but that's because Carey has
spent the preceding sections explaining color theory. If you have the
time, I recommend you read the entire chapter.


--
Wel zie ik het betere en prijs het;
toch jaag ik het slechtere na