| 摘要 |
An ink jet print cartridge having a first ink chamber containing a first type of ink and a second ink chamber containing a second type of ink. The body has a third fluid chamber containing an unpigmented fluid different from the inks. A printhead attached to the body has a set of orifices associated with each chamber. The inks may be reactive inks, and the third fluid a buffer to prevent precipitation reaction on the print head surface. The orifices for the buffer may be positioned between the orifices for the different inks to prevent mixing during wiping, except in the presence of the buffer.
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