Dye ink yellow problem

The Hat said:

@palombian, I have not used any of the Prodinks since I had the reaction with the yellow ink despite you reporting good success with most of their pigment inks much later.

I care too much for my 9500’s to chance using their pigment products again, I still have 450 ml left in bottles unused, but their dye inks seem to be pretty acceptable and doesn’t cause any problems.
I tried to log in to their site about 4 week ago and found the sever down and got a error, which I found very strange at the time, but now we know why..

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I was very pleased with Prodinks dye inks, I use them in 6 printers, hope to find out where the problem is.

From their PGI-9 pigments I use only the Matte Black and the Magenta in the MX7600, still have a small quantity of Cyan, the 9500 doesn't clog with this.
I keep my fingers crossed, my MX7600 never printed as good as now.

Theory is when you know everything but nothing works.. !
Practice is when everything works but you don’t know why.. ! !

To come back on this after some "practice" :

Since I had yellow blocks on my 3 dye printers (IX6550, MG5250 and MG8250) after receiving a new bottle of Prodinks, I temporarily loaded OEM Canon yellow and had no issues since.
In the mean time the OCP Y arrived and I flushed, filled a few carts and printed enough plain yellow A4 sheets to be sure the ink passes through.

Made new profiles.
The OCP yellow is darker (more yellow) than the Prodinks I always found too light, but not as deep as the OEM Canon.
Printed some photos on the three printers (in fact IX6550 and MG5250 are the same) and on the PRO9500 to compare, profiles seem to be good.

I also printed some photos directly from the camera and compared with the prints made with my own workflow (LR).
The prints out of the camera were still a little cooler, but very acceptable and not with a dominant blue haze as was the case with the Prodinks yellow.
So, even when I have no balanced inkset, the result is less deviant from the Canon one than before with a full Prodinks set.

I hope the OCP yellow ink will do it, as all other Prodinks colours do by the way.

One disadvantage: the OCP yellow has a rather strong chemical smell before it is dry.
It also costed me a printhead (stock purchase price € 20).

Just my experience, I will not lose more time to "know why".

This is when theory and practice are combined and everything works but you still don’t know why…..

The Hat said:

Theory is when you know everything but nothing works.. !
Practice is when everything works but you don’t know why.. ! !

Click to expand...

Theory: "Knowing everything about anything"

Practice: "Hmm - That's funny. Why did it do that?"

rs

palombian said:

Recently I observed loss of yellow after printing a few pages, the image (waving lines across the page) suggesting cartridge flow problems.
…
The color does not come back with cleaning cycles, I have to remove the printhead and bath it overnight.
The next day everything is fine again until the next long print job.
Only the yellow is affected.

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This is EXACTLY what I have been experiencing the past few days on my Pixma ix6550 which I have created a new thread. But the fact after reading through these forums I have found a post that is identical to what I am going through with a 3rd party CLI-525 Yellow.
Yes I have yet again "bathed" the PrintHead today and is now wrapped in paper towels drying out. Like this post mentions I may well print again in the morning thinking all is fine and dandy, then after a few prints the Yellow will yet again become elusive.