Re: How does the printer choose which black ink to use when it has pigment and dye based black ??

You are correct. All the pertinent nozzles (excluding dye black) are firing except for the first passes and the last ones for a given page and/or image when printing color on plain paper. This first 1-2 passes are laying down pigment black and the last 1-2 passes are laying down CYM inks only.

Arthur Entlich wrote:
I think you two aren't understanding each other. I don't think Michael is stating anything that contradicts your statement by his own comment in this posting. He is just saying that by watching how the inks are being laid down as they are being printed, just in terms of when the ink appears on the page relative to the black and color, that the pigment ink head couldn't be used, because of how the ink was appearing relative to the position of each head. I assume the dye ink heads are all in one clump and the pigment ink head is offset.

I don't think he is arguing with you that the two heads can work simultaneously, in fact, he stated in another post that they do so on the plain paper profile, just that what he is seeing confirms that with the premium coated paper profile, the dye inks only are being used.

If I'm confused, then I apologize, but I think the two of you are not expressing mutually exclusive positions.

Art

Bob Headrick wrote:

"Michael Johnson" <cds@xxxxxxxxx> wrote in message news:yYqdnUbML8ZYrQPanZ2dnUVZ_u-unZ2d@xxxxxxxxxxxxxxx

I just performed the tests that Dan mentioned and they do show that pigment black is used when printing color on plain paper. When I specified photo paper the black lead-in ink wasn't present and it looked like all the colors (including black) were laid on the page during one pass of the head. Because of the configuration of the nozzles, this would only be possible if it used only the dye black cartridge.


The last statement is just not true. Printers can and do lay down drops from black and color in the same swath, even if the black drops are larger and contained in a different printhead with a different swath size. This happens to be the absolute truth, you can doubt it if you wish but I have said all I care to on the subject.

- Bob Headrick, MS MVP Printing/Imaging


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Relevant Pages

  • Re: How does the printer choose which black ink to use when it has pigment and dye based black ??
    ... He is just saying that by watching how the inks are being laid down as they are being printed, just in terms of when the ink appears on the page relative to the black and color, that the pigment ink head couldn't be used, because of how the ink was appearing relative to the position of each head. ... I assume the dye ink heads are all in one clump and the pigment ink head is offset. ... pigment black is used when printing color on plain paper. ...
    (comp.periphs.printers)
  • Re: How does the printer choose which black ink to use when it has pigment and dye based black ??
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  • Re: How does the printer choose which black ink to use when it has pigment and dye based black ??
    ... In addition to using the dye ink for double-sided printing, it also uses the dye black when it uses the other colors. ... I'll also add that on a IP4xxx printer, if you never use anything but plain paper settings, the dye black ink takes about a year to run out, as it's only expended in cleaning cycles. ...
    (comp.periphs.printers)
  • Re: How does the printer choose which black ink to use when it has pigment and dye based black ??
    ... In addition to using the dye ink for double-sided printing, it also uses the dye black when it uses the other colors. ... I'll also add that on a IP4xxx printer, if you never use anything but plain paper settings, the dye black ink takes about a year to run out, as it's only expended in cleaning cycles. ...
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  • Re: Nozzle Test
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