Re: Things and such

James Cort <jim@xxxxxxxxxxxxxxxx> writes:

> On Wednesday 14 July 2004 17:58, Roger Leigh wrote:
>> James Cort <jim@xxxxxxxxxxxxxxxx> writes:
>> > On Tuesday 13 July 2004 17:47, Roger Leigh wrote:
>> >> A4 glossy photo paper (HP paper, rather than Epson, IIRC).  I guess
>> >> the printer had a faulty printhead, given that the Epson Windows
>> >> driver output was also bad (though the testpattern looked OK bar a
>> >> little ink spreading).
>> >
>> > I've seen parallel lines running down a page before with Epson printers
>> > and HP paper. It turns out that the pinwheels in the printer seem to
>> > scratch the surface as the paper goes through, effectively causing an
>> > appearance of "lines" (composed of lots of dots if you look closely) all
>> > the way down the page.
>>
>> I don't think that's the problem here: the top edge of the paper is
>> the left-hand side.  The fine lines are actually horizontal.
>
> Ah, my fault for misinterpreting the scan. 
>
> It's a bit hard to tell - I don't know if it's my monitor or the original 
> image but I cannot make out any sign of horizontal lines.

It's a digital photo rather than the scan.  If you rotate 90 degrees
clockwise and look from a distance of a few feet, the lines should be
apparent.  They aren't actually white in the middle of the page--they
are paler, and the density of the weave pattern alternates between
being OK with faint lines and moderately OK with very distinct lines
(though the photo can't show this subtle variation).

> I would expect this to be the result of clogged nozzles - they can
> be a right sod to get properly clean with Epsons once they get
> gummed up and the "test" pattern is not always a perfectly reliable
> test.

The test pattern was ~perfect.  Glen Petrie from EPSON thought it
might be a bad printhead, and he knows more about it than I ever will!


-- 
Roger Leigh

                Printing on GNU/Linux?  http://gimp-print.sourceforge.net/
                GPG Public Key: 0x25BFB848.  Please sign and encrypt your mail.


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