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How can I print out a PDF substituting pixels for blue pixels?

Fresh5 days ago
Mar 15, 2026105277 views
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Problem

I have no more black ink in my Canon MP560 printer. All other colors print fine. I need to print out an online train ticket. When I print it out, I can't see any of the page that is in black (most of it, all the text). I already printed it as a PDF so I can print it out later if I get some black in…

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Fix for: How can I print out a PDF substituting pixels for blue pixels?

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Install Ghostscript (first) and then ImageMagick, and then you can use the following command: This will convert all the black in with blue in . [Thanks to Nick's comment below for the part about ghostscript.] Note added later: If you have a newer ve…

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