Canon Pro pigment printers nearly clog proof ? I begin to differ.

@Adriatix: I’m totally certain that it was a clog. Why only the magenta color and why on a quasi-new printhead that was well cared for ? I can’t say.

After seeing the problem in the nozzle test I ran a normal cleaning cycle of the magenta group. No improvement at all. Then a deep cleaning, No changes. Any possible excess of ink due to overfilling would have been sucked by the cleanings. If it hadn’t been a real clog, the issue would have been fixed. Furthermore, when I removed the printhead to soak the nozzles in cleaning fluid for some hours, I checked the bottom area and it was normal; no pools of ink whatsoever.

I refill using a electronic scale up to 33-33.5 grams. I’ve tested the maximum capacity of a PGI-72 cart and you can fill it up to a weight of almost 35 gram (including the orange clip). At this weight, the output pad is very wet and leaks maybe a drop or two of ink. This is it, no more ink comes out. In fact, it won't even drop a single drop unless you shake the cart a bit when removing the clip. Therefore, I concur with @The Hat that you can’t really overfill PGI-72 carts. Not to the point of making a pool of ink on the nozzles area when the cartridge is installed,
Anyway, to be on the safe side, I always refrain from surpassing 33.5 grams.

Since that problem I’ve been printing and performing nozzle checks on a regular basis. So far, everything is perfectly fine.

A wise man will always start his day with a nozzle check first, its the best reassurance anyone can get..

As far I can see this is the first time that you admit that you have been refilling this cartridge. Then it is different story

Then you have problem with magenta pigment ink.Yes this can be a case as well. We have had experienced similar problems with magenta pigment ink for Canon and HP. And I do think that they all share the same magenta Raw pigment from the same source.

Recently we have had received some concentrate pigment samples from an prominent manufacturer. But this magenta pigment concentrate has not passed our tests. Cyan Yellow and Black concentrate were perfect but magenta pigment has visually been setting down after a couple of months.

So I do suggest you that you stay with original magenta ink. Or ask for better and verified pigmented ink for Canon.

You say that finally I admit having refilled as if it was a shameful fact that I’ve trying to hide for long..
In other threads I’ve said more than once that after upgrading to a Canon Pro10 from a Pro9000, I started to use Octoink products when the OEM ink was exhausted ( except for the Red, where I stick with Canon OEM ).

Octoink products, are among the better non OEM Canon pigment inks that a final user can buy in Europe, according to most people here. Their current PGI-72 set, dating from 2016, is an improved version over the original from 2013 and, so far, everybody seems to be happy to them. At least, I haven’t read any complaints from other buyers concerning the magenta or other colors.
The owner is, as possibly you know, a fellow member of this forum but if he sold low grade stuff, rest assured that we wouldn’t refrain from shouting angrily our disapproval.
Of course, we can’t discard the possibility of an occasional batch of bad ink. If the issue reappeared in the magenta channel (knocking on wood .. ) you may have a point.

Nonetheless, the clog might be also for other reasons, For instance, if I injected a bit of air mixed with the ink when refilling the cartridge, some stubborn air bubbles might have blocked the inkflow on a number of nozzles. It seems a far fetched explanation but, who knows ?

As you probably knew every one that sells inks is saying the are an ink manufacturer. But in fact they are using an ink concentrate for that purpose. And the trouble with magenta concentrate is that you need a more of it to get suitable color then with the rest color. So it is tricky to design this particular ink if you have not tested it on that particular print head. Because these same concentrate is use for all other pigment inks Epson & HP. While the most of them do have different color interpretation. So very possible some one has been using some universal pigment concentrate for manufacturing that ink in difference to Canon source of the same pigment. So they need to increase pigment concentration to get the same color interpretation.

So some less intensity magenta ink could be a better choice for refiling.

Or in general in this case if the cartridge is not dripping on print head it can be easily that some one has sold you Epson magenta pigment ink for Canon pigment magenta ink, because in that case because of difference in ink composition you would have as well dripping of that ink on nozzles because droplets can not be fired properly because of difference in droplet weight, bubble firing and droplet consistency

Artur5 said:

Octoink products, are among the better non OEM Canon pigment inks that a final user can buy in Europe, according to most people here.

Click to expand...

Adriatix, You obvious don’t read posts correctly on the forum, maybe it’s to suit your own interpretation of the facts as you wish to see them.

You are misguided over something that happened somewhere else, and are misusing the information given to you in good faith, now if you can’t except members honest opinions then don’t post your own contradictory opinions.

Stick to facts and not hearsay, you have posted numerous times in this thread and have added little to contribute except controversary, so calm down or butt out..
This is a clear warning to you...The Moderator...

In the past there have been minor problems with magenta ink from the original supplier of octoinkjet.co.uk and precisioncolors.com.
No clogs visible in the nozzle check but slight feed problems.
The inks sold since at least 2-3 years do not have this anymore, IMO they perform very well.