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BJC-8500
2.2.1 P-POP (Plain Paper Optimized Printing) mode
This printer ejects ink optimizer from Black BJ cartridge BC-80 only when plain
paper, envelope, or thick paper modes (except when print quality is set to high speed)
are selected on the printer driver. During color printing, the printer ejects ink on the
ink optimizer. Waterproofing properties are improved during black printing, either by
ejecting black ink, then ink optimizer and then black ink or by ejecting black ink and
then ink optimizer.
Paper Surface
2.2.2 Draft mode (Print Quality: High Speed)
The draft mode is the fastest printing mode on this printer. In this mode, ink is
printed by one pass in the uni-directional mode (254 nozzles used) when color ink is
printed, and in one pass in the bi-directional mode (256 nozzles used) when only
black ink is used.
In this mode, the amount of ink used is reduced with the ink ejection rate on the
paper at 50%. So, images are printed faint.
2.2.3 Photo printing mode
In this printing mode, the Photo BJ cartridge BC-82 Photo containing lower density
ink and Color BJ cartridge BC-81 can be used to print halftone and high-contrast
areas with less graininess.
Combining color ink and photo ink allows 17 gradations of expression. This achieves
both high-contrast rendering and subtle coloring in the midtones. Also, graininess is
reduced in low-density areas.
2.2.4 Carriage Speed
The carriage speed varies due to printer driver image processing resolution
Printer driver image processing resolution (dpi)
300
300 (print quality: draft)
300
300 (other than the above)
600
600 (print quality: standard (HS))
600
600 (other than the above)
Color Ink
Ink Optimizer
Paper Surface
Figure 4-10 Ink Layering with the Ink Optimizer
TABLE 4-2 CARRIAGE SPEED
Black Ink
Ink Optimizer
Black Ink
Paper Surface
Carriage speed (inch/sec)
4-11
Part 4: Technical Reference
Ink Optimizer
Black Ink
26.7
16.7
8.3
16.7
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