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Has anyone done a microscopic examination on the old magenta to determine the presence of bacteria or fungal contamination? Or is it a material change in the magenta dye itself?
Grazer5's post in the other thread might suggest that it isn't old ink, at the rate he is using it.
The print head from my 9000 II showed a partial obstruction of the magenta slot on the output grid. Not having a microscope, I cannot determine what form it takes.
http://www.printerknowledge.com/attachments/nozzles-3-jpg.1209/
Third slot from the left.
I have had numerous discussions with Image Specialists on this and they assure that the dye they purchase has not changed. This does not mean that THEIR supplier has not changed it or even maybe the supplier to IS supplier. It is not the formulation itself per se. But something has changed and not within Image Specialists knowledge or control. Any other change would have affected other colors as well....So the culprit appears to point to the dye and what it comes with. Eventually they will find out but as for myself, the only solution is to move on to another supplier which I now have done.