Which black is used on a Canon 1p4300 when printing different material?

[videobruce]

FYI, this is one of the 1st series of Canon ink jets with the dreaded 'chip' in the tanks, but unlike the models after these, this are re-settable.

I'm having a problem printing certain documents out regarding using a hi-lighter afterwards on the document.
With some, the text gets smeared terrible with a highlighter (I tried 2 different types) and other prints are fine. It's clearly the Photo black, not the Pigment black that is smearing!

It's never was a problem before and I've had this model printer for probably 10 or so years.
I use 'Precision Colors' bulk ink for a few years now switching from another supplier that closed shop unfortunately. One document will be fine, another will 'smear' terribly.

So, the question is; what determines which 'black' is used;
Is it the type of document; .txt, .doc, .odt (Open Office program which I use all the time), or .pdf?
If it has a photo, picture or drawing, is it the program) itself? Of course smearing w/ a highlighter isn't a issue w/ s photo or similar.

At first, I thought I mixed up the 'blacks' when I refilled the last time, but not so. (I keep a loaded, spare set so when the tanks runs out, all I have to do is swap the empty tanks out then finish printing). I reset the chip, refill that tank, cap it off and put the set back in the desk drawer. Very little downtime and the printer isn't left open more than a few seconds.

 

[PeterBJ]

The iP4300 and all(?) other Canon printers for home use only use the pigment black PGI-5 PGBK for the media setting plain paper. For all other media settings like photo paper, high resolution paper, and CDs the photo (dye) black is used. IIRC duplex printing on plain paper also uses the photo black.

The black ink used is independent of file type and is only determined by the media setting. There might be an exception to this rule, pdf files sometimes prints a dye gray maybe mixed from C-M-Y inks instead of black, sometimes it prints using pigment black.

Years ago, when the unchipped iP4000 was new, cheap aftermarket cartridges were popular. Some of these cheap pigment black cartridges ruined a lot of iP4000 printheads by clogging. The manufacturers of these cheap cartridges found a solution to the problem. They filled both black cartridges with the same dye ink. Could some manufacturer/seller of refill inks use the same trick?

Even some pigment inks smear, even Canon OEM. See this from a druckerchannel.de test of a Canon iP5300 that uses the same inks as the Ip4300. Some highlighters are better than others. I recommend "Staedtler Textsurfer Classic"

Here is a test print made with my Canon MP990 using the 1128 PGI ink from Image Specialists and a Staedtler highlighter, click to enlarge.



Excuse me, but are you 100% sure you didn't refill some PGI-5 PGBK cartridges with photo black ink?

You can test the ink in the "big black" cartridge to see if it is pigment or dye. See this post. And here is a "big black cartridge that contains dye ink instead of pigment ink.

 

[Ink stained Fingers]

It's as well with borderless printing on copy paper that the printer switches from the pigment black to the dye black ink, this prevents the build-up of pigment residue from overprint at the borders of the paper.