Copy Process; Expression Of Colors And 4-Step Copy Process - Toshiba e-STUDIO2500c 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.
In this equipment, 4 color process units (EPU), which include a drum, a developer unit and a main
charger, for yellow, magenta, cyan and black are placed in parallel. Colors are developed in the order of
Yellow (Y) → Magenta (M) → Cyan (C) → Black (K). An image with the 4 developed colors is trans-
ferred on the transfer belt by layering the colors one by one (1st transfer). Then the image is formed on
a sheet by being transferred from the transfer belt by the 2nd transfer roller (2nd transfer).
Photoconductive drum
Developer unit
May 2006 © TOSHIBA TEC
Yellow
Red
Black
Magenta
Blue
[ Three primary colors ]
Fig. 3-1
1st transfer roller
Transfer belt
Main charger
EPU ( Y ) EPU ( C )
EPU ( M )
EPU ( K )
Fig. 3-2
3 - 1
Green
Cyan
Fuser unit
2nd transfer roller
Laser optical unit
e-STUDIO2500c/3500c/3510c COPY PROCESS
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