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.
http://mirror.imagemagick.org/discourse-server/
http://mirror.imagemagick.org/discourse-server/viewtopic.php?t=7451