These cartridges You have probably used very carefully, two out of three have been there probably meant well when filling, they dropped something. So be careful when inserting! After a short use fell in all of the pressure. An intensive cleaning handed at best for 1-2 printed pages. I have followed an original cartridge used (NTT sorgfälig closed) and the pressure was perfect. The 1/3 emptied Canon again exchanged for one of the most compatible and also these now prints properly. My many years of experience: Compatible pigment inks cause such problems probably often. With me so far helped, between an original cartridge to use. The problem I never had with Dye inks.
Supplement 31.05.2014: Even after (absolutely unproblematic) Usage 1 Original cartridge Canon nozzle sat me be in the IP 4600 in this ink (by the way also with I-Color) after not more than 1/4 Use of these cartridges again. Apparently, either The viscosity greatly deviating or Canon contains a solvent to clogging
Generally, this printhead seems very tolerant with the dye-based inks, but to be hypersensitive in foreign pigment inks. The problem is exacerbated by prolonged use of the printer, but with original cartridges will print quality and reliability as the first day. I would now awarded only 1-2 stars.
