BUG: Grayscale graphics are printed as CMYK output in Publisher 2003

When you print a publication that contains grayscale (8-bit) images, those images separate as cyan, magenta, yellow, black (CMYK) builds. Therefore, instead of appearing on only the black plate, the images appear on the cyan, magenta, and yellow plates also.

This symptom occurs whether you print color separations directly from Microsoft Publisher, or print them as composite CMYK, and then use another program to separate the publication.

This behavior occurs because Publisher treats grayscale images as 24-bit red, green, blue (RGB) images, and then separates them according to its built-in RGB-to-CMYK color profile. This profile separates most grayscale images as CMYK builds.

In Publisher, recolor the image(s) to black, or to the rich black of your choice.

1. In Publisher, open the publication.
2. Right-click the image, and then click Format Picture.
3. In the Format Picture dialog box, click the Picture tab.
4. Click Recolor.
5. Do one of the following:
   • In the Color list, click the black swatch, and then click OK.
   • If you want to use a rich black instead, follow these steps:
     1. In the Color list, click More Colors.
     2. In the Colors dialog box, click the Custom tab.
     3. In the Color Model list, click CMYK.
     4. Type the values that you want for the Cyan, Magenta, Yellow, and Black fields.
     5. Click OK three times.

Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.