Hi all,

I have been trying to embed a black and white PNG image into a PDF document, but for some reason this image seems to change color once embedded.

The image is pitch black, with some grayscale in the antialiasing. When it is printed from the PDF, using both xpdf or Acrobat 6, the resultant image is blue-gray in color, but not pitch black like the original PNG.

This is causing problems for us, because it's coming out as a "colour print" out of the printer, which we get charged for per colour copy.

Does anyone know how to tag an image as black and white only?

Regards,
Graham
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