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Bug#329657: cupsys-driver-gutenprint: Canon BJC-250 printout too light

Package: cupsys-driver-gutenprint
Severity: normal

I own a Canon BJC-250 and never cared to use the printer under Linux because
the printout quality is too bad. Now I have no other choice and therefore
filing this bug report. My print server runs Gutenprint 5.0rc1 but this
bugreport also applies to all versions before.

The problem is that the printout is too light. Black text gets printed out
gray, with an opacity of about 50 percent.

I have tried several settings but only two change the result: Setting of the
media type and setting of black density.

When using plain paper setting the media type to Photo Glossy Paper makes
the printout appear nearly black, estimated 80 percent saturation. Adjusting
the black density value to 2 makes the printout acceptable, but not
completely black. The saturation is then about 98 percent.

Using these two settings to produce reasonable output seems like a misuse to
me. Things get worse when I choose a different color model from RGB or
change any other settings such as color correction.

Those are the facts. I have done some source code lookup but with no
concrete evidence. Somehow seem the values of canon_paper_list in
print-canon.c involved but I cannot tell for sure.

-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12-1-686
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C)

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