Copy Process; Expression Of Colors And 4-Step Copy Process - Toshiba e-STUDIO281c Service Manual

3.

COPY PROCESS

3.1

Expression of Colors and 4-Step Copy Process

A variety of colors can be expressed by mixing the three primary colors: Yellow, magenta and cyan.
Red can be created by mixing yellow and magenta; blue can be created by mixing magenta and cyan;
green is created by mixing cyan and yellow; and mixing all the three primary colors allows you to obtain
black.
This equipment has accomplished to improve reproducibility by adding black toner to the mixture of the
above three colors at proper ratio.
This equipment adopts a revolver mechanism which combines the three developer units of yellow,
magenta and cyan. In this process, each image of cyan, magenta and yellow is developed in order by
rotating these developers and overlaid on the transfer belt one after another. Then the black image
developed by independent black developer unit is overlaid for the best expressions of colors. Four lay-
ers of color image (K→C→M→Y) on the transfer belt are transferred onto paper.
1st transfer roller
Color developer unit
Laser optical unit
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Yellow
Red Green
Black
Magenta
Blue
[ Three primary colors ]
Fig. 3-1
Transfer belt
Black developer Main charger
unit
Photoconductive drum
Fig. 3-2
3 - 1
Cyan
Fuser unit
2nd transfer roller
e-STUDIO281c/351c/451c
3
COPY PROCESS