Posted: 2006-09-19T10:59:04-07:00
Perhaps your printer only prints black-white. In that case add the -monochrome option to your command line.
Use https://github.com/ImageMagick/ImageMagick/discussions instead.
https://imagemagick.com/discourse-server/
https://imagemagick.com/discourse-server/viewtopic.php?t=7451