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BJC-6000
2.2 Print Control
2.2.1 Print mode
The printer adjusts the carriage action and paper feed action according to the
installed cartridges, selected print media, printing quality, print data, etc. to ensure
high quality printing free from diffusion and density variations. Multiple passes are
used to provide staggered print timing with multiple nozzles used to print one luster,
so that the quantities of discharge that vary from nozzle to nozzle will be smoothed
out to minimize density variations. It is smear-free because it is not until the ink for
the last pass printed is fused on the paper that the next pass is printed. Printing can
be divided up to a maximum 8 passes, depending on the print media.
2.2.2 Multi-drop print
The BJ cartridges used in this printer incorporate drop-modulation technology,
allowing two ink drop sizes, large and small, to be ejected. This allows small dots to
be selectively used for printing in low-density areas to lessen granularity, while large
dots can be used in high-density areas to offer high speed printing. In the 720 dpi
and 1440 dpi print modes, only small dots are used continuously to provide highly
detailed printing.
2.2.3 Photo-print
The photo-print uses both the Photo BJ cartridge, which uses low density ink, and the
Color BJ cartridge to provide printing with up to 6 colors of ink. By printing in low-
density image areas with ink of 1/3 normal ink density (photo-cyan and photo
magenta), printing with rich gradation and suppressed graininess is possible.
In the photo-print mode, each pixel is converted into a maximum of 4 values
(expressed by two bits), so that for each 360 dpi pixel, up to 4 gradations of each color
can be printed in a combination of large and small dots. The 6 ink colors of the Photo
BJ cartridge and Color BJ cartridge allow a more dynamic range of printing colors,
thus providing higher printing density using less ink than would have been possible
with 4 low-density ink colors.
2.2.4 Automatic switching control of printing nozzles
When the printer is set to the normal (for speed) plain paper mode (1 path) with the
Black BJ cartridge (160-nozzle) installed, the number of nozzles to be used for
printing will be automatically set within the nozzle range 48 - 160 during printing
according to the image data to be printed. Continuous printing with black will be
performed with 160 nozzles, but, in areas with color data, 48 nozzles will be used for
printing to prevent running.
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Part 4: Technical Reference
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