Ricoh Aficio 3131 Operator's Manual page 237

Full-Color Copying System
K developer
Photo-
Paper
conductor
(Y+M+C+K)
Generally, printers use 4 color toners or inks (3 primary colors and black) which are mixed
together to reproduce colors. (In theory, any color can be made with the 3 primary colors, but
black is difficult to reproduce since the 3 primary colors may make it dark brownish.)
This copier makes a full-color image by piling up the 4 color toners one by one on paper
conveyed on the transfer belt as shown in the figure above.
C developer
unit unit
Photo-
conductor
(Y+M+C)
M developer Y developer
unit
Photo- Photo-
conductor conductor
(Y+M)
Laser equipment
unit
Paper
Transfer belt
(Y)
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