Ricoh AP3850C Service Manual download pdf (Page 25)

1-9 Managing color on the Fiery 3850C

One example of how you might use this setting is with a page that contains some black

text on a light blue background. The background blue color is CMYK = 40%, 30%,

0%, 0% and the black text is CMYK = 0%, 0%, 0%, 100%.

• With Black Overprint On, the ﬁnal text portions of the page are overprinted, or

combined with the underlying colors. This results in CMYK = 40%, 30%, 0%,

100% for the color used for the text. There is no transition in the cyan and magenta

toners, and the quality of the output is improved since it will not show artifacts near

the edges of the text. The option also works with text deﬁned in the RGB color

space, that is RGB = 0, 0, 0.

• With Black Overprint Off, the border of the text is on an edge that has cyan and

magenta toners on one side (outside the text) and black toner on the other side

(inside the text). On many devices, this transition causes visible artifacts because of

the practical limitations of the printer.

Spot Color Matching

The Spot Color Matching option provides automatic matching of PANTONE colors

with their best CMYK equivalents.

• On—The Fiery 3850C uses a built-in table to generate the closest CMYK matches of

PANTONE colors your printer can produce. (New tables are generated when you

add new output proﬁles.)

NOTE: Spot colors not included in the built-in table are treated as CMYK.

• Off—The Fiery 3850C uses the CMYK equivalents deﬁned by your application to

print PANTONE colors.

For jobs that include PANTONE spot colors, set Spot Color Matching to On unless

you are printing press simulations. In that case, set Spot Color Matching to Off and

choose the appropriate CMYK Simulation setting (see page 1-6).

NOTE: You can use the Spot Color Matching option only when printing composites,

not when printing separations.

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Ricoh AP3850C Service Manual Page 25