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

Michael Johnson wrote:
Bob Headrick wrote:
"Michael Johnson" <cds@xxxxxxxxx> wrote in message news:deCdnd2HoIYUpQDanZ2dnUVZ_rKtnZ2d@xxxxxxxxxxxxxxx

The configuration of the jets in the head are different for the pigment black than the other dye cartridges. For this reason I don't see how the pigment jets can work with the dye jets to lay down the ink with enough precision. They are physically different and located apart from each other.

That is not an issue, as the printer "knows" how far apart the various nozzles are, as well as the nominal sizes of the ink drops. The clever printer firmware can handle properly placing inks from different printheads in the proper locations on the paper.

The pigment row of jets is physically longer then the dye rows. It is actually 2-3 times longer and doesn't line up with the dye rows evenly. This would mean only a small part of the row of pigment jets would fire when printing with the other dye rows on the same pass. The jet configuration in the head seems to indicate to me that the pigment jets work by themselves and the dye jets work only with each other. Add to this the inks are different makeups and the pigment jets max out at 600 dpi while the dye jets max out at 1,200-4,800 dpi and I don't see how they can work together. Anyone have any links to webs sites that confirms this one way or the other?

Michael, you must be somewhat new to the group. You are disagreeing with the wrong person. Bob was a long time Eng for HP at their inkjet printhead div. Unless you have equal credentials, you arguing with the wrong person IMO.

Mickey
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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 ??
    ... For this reason I don't see how the pigment jets can work with the dye jets to lay down the ink with enough precision. ... It is actually 2-3 times longer and doesn't line up with the dye rows evenly. ... This would mean only a small part of the row of pigment jets would fire when printing with the other dye rows on the same pass. ...
    (comp.periphs.printers)
  • Re: How does the printer choose which black ink to use when it has pigment and dye based black ??
    ... For this reason I don't see how the pigment jets can work with the dye jets to lay down the ink with enough precision. ... It is actually 2-3 times longer and doesn't line up with the dye rows evenly. ... This would mean only a small part of the row of pigment jets would fire when printing with the other dye rows on the same pass. ...
    (comp.periphs.printers)
  • Re: How does the printer choose which black ink to use when it has pigment and dye based black ??
    ... Although Michael and Bob were not in agreement at this point in the thread, later in it, some tests done by Michael resolved this question, but his explanation was misinterpreted, which further escalated ... For this reason I don't see how the pigment jets can work with the dye jets to lay down the ink with enough precision. ... This would mean only a small part of the row of pigment jets would fire when printing with the other dye rows on the same pass. ...
    (comp.periphs.printers)