[comp.sys.mac.hardware] Deskwriter banding

upsiu@mcs.drexel.edu (Paul Siu) (05/28/91)

I seem to have a problem with HP when printing gray scale graphics, there
would be a offset in the printhead so that graphics print out with band lines.
I have called HP, and they claim that they know about the problem but does not
know whether they will be a fix.  Has anyone found a way to get around this
problem?  One of the reason I brought HP was because of 300dpi graphics, the
bands makes the printer unacceptable for graphics use.

Paul Siu
upsiu@mcs.drexel.edu

neff@hp-vcd.HP.COM (Dave Neff) (05/30/91)

Regarding DeskWriter "banding".

This is usually due to the ink cartridge, not the printer, which will
sometimes have some variation in ink drop size or direction resulting
in the variation you have seen.  A new cartridge may give better results.

There are also some different print modes the driver could in theory use
to mask this problem, but I don't know if our driver people are putting
some of these modes into a new release of the driver (I kind of doubt it).
I assume you don't have a clogged nozzle (print self test and look at
the pattern), as this can lead to white bands as well.

Laser printers also will have variation in black and grey scales.  So
will the StyleWriter. You may or may not find this other printers acceptable
as well.

Dave Neff
neff@hpvcfs1.HP.COM