Digital BW, The Print

After a rather frustrating couple of days, I am still having problems printing images with 
100% black backgrounds.  I am using the 1440 super dpi setting, ordered dither and matt 
paper.

I am getting, every inch measured from the right side of the image, a 2mm or so thick 
_line_ where the ink laydown is _interupted_  I can see this effect occurring as the ink is 
laid down on the paper. So every inch there is a vertical line across the background.  (It is 
not a roller problem.)

As a test I created a new image in PS which was simply a black square of the 100% 
background colour.  The effect occurs when printing this image also. On the test image, 
adding 1% noise helped the problem, but this worked on one but not on another real 
photo.

Printing at 1440dpi (rather than 1440 super) tends to create very fine horizontal banding 
and a very unacceptable result.  I have a good nozzle check and the MIS purge pattern 
prints well. 2880dpi does not work with matt paper.

What gives?  Does anyone else see this happening? Can someone else try my black square 
test?  If it is my printer, what could be wrong with it?

Thanks


Steve

As a further test, I printed my test image as a colour document with the
Epson driver and none of the problems are evident.  So I really think this
is a driver issue...

> From: Steve Kale <stevekale@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Sat, 02 Oct 2004 16:25:59 -0000
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: [Digital BW] New QTR for Mac, 100% K and Dither
> 
> 
> 
> After a rather frustrating couple of days, I am still having problems printing
> images with 
> 100% black backgrounds.  I am using the 1440 super dpi setting, ordered dither
> and matt 
> paper.
> 
> I am getting, every inch measured from the right side of the image, a 2mm or
> so thick 
> _line_ where the ink laydown is _interupted_  I can see this effect occurring
> as the ink is 
> laid down on the paper. So every inch there is a vertical line across the
> background.  (It is
> not a roller problem.)
> 
> As a test I created a new image in PS which was simply a black square of the
> 100% 
> background colour.  The effect occurs when printing this image also. On the
> test image, 
> adding 1% noise helped the problem, but this worked on one but not on another
> real 
> photo.
> 
> Printing at 1440dpi (rather than 1440 super) tends to create very fine
> horizontal banding
> and a very unacceptable result.  I have a good nozzle check and the MIS purge
> pattern 
> prints well. 2880dpi does not work with matt paper.
> 
> What gives?  Does anyone else see this happening? Can someone else try my
> black square 
> test?  If it is my printer, what could be wrong with it?
> 
> Thanks
> 
> 
> Steve
> 

> 
> 
>

Hi Steve!

I have the same problem as you with lines when printing 100% black, 
but I use a PC.
I also tried to print a colour document with the Epson driver and the 
lines are not there.
Have you found a solution for this problem?
How much noise did you ad to your black to get rid of the lines?

.pontus.



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale 
<stevekale@b...> wrote:
> As a further test, I printed my test image as a colour document 
with the
> Epson driver and none of the problems are evident.  So I really 
think this
> is a driver issue...
> 
> 
> > From: Steve Kale <stevekale@b...>
> > Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > Date: Sat, 02 Oct 2004 16:25:59 -0000
> > To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > Subject: [Digital BW] New QTR for Mac, 100% K and Dither
> > 
> > 
> > 
> > After a rather frustrating couple of days, I am still having 
problems printing
> > images with 
> > 100% black backgrounds.  I am using the 1440 super dpi setting, 
ordered dither
> > and matt 
> > paper.
> > 
> > I am getting, every inch measured from the right side of the 
image, a 2mm or
> > so thick 
> > _line_ where the ink laydown is _interupted_  I can see this 
effect occurring
> > as the ink is 
> > laid down on the paper. So every inch there is a vertical line 
across the
> > background.  (It is
> > not a roller problem.)
> > 
> > As a test I created a new image in PS which was simply a black 
square of the
> > 100% 
> > background colour.  The effect occurs when printing this image 
also. On the
> > test image, 
> > adding 1% noise helped the problem, but this worked on one but 
not on another
> > real 
> > photo.
> > 
> > Printing at 1440dpi (rather than 1440 super) tends to create very 
fine
> > horizontal banding
> > and a very unacceptable result.  I have a good nozzle check and 
the MIS purge
> > pattern 
> > prints well. 2880dpi does not work with matt paper.
> > 
> > What gives?  Does anyone else see this happening? Can someone 
else try my

> > black square 
> > test?  If it is my printer, what could be wrong with it?
> > 
> > Thanks
> > 
> > 
> > Steve
> > 
> 
> > 
> > 
> >

No I have not.  I suspect there is an issue in the underlying GIMP/CUPS code
upon which QTR relies but only Roy can answer that.  With one image 2% noise
(Gaussian) worked but not with the other.  I am hoping Roy can chime in
here.

> From: pontusman <pontusman@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Mon, 04 Oct 2004 11:16:53 -0000
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW] New QTR for Mac, 100% K and Dither
> 
> 
> 
> Hi Steve!
> 
> I have the same problem as you with lines when printing 100% black,
> but I use a PC.
> I also tried to print a colour document with the Epson driver and the
> lines are not there.
> Have you found a solution for this problem?
> How much noise did you ad to your black to get rid of the lines?
> 
> .pontus.
> 
>