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104
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a) It is important to control the PCS value to print dropout colors. (You
need to choose a printer equipped with devices that can measure PCS
values.)
Peak sensitivity
wavelength
Color
Remarks
740(nm)
Sepia
Abundant dropout colors
Magenta
Purple
Some ballpoint pens cannot be used.
Brown
Bluish tones
Greenish tones
660
Rose
For red end colors only,
Pink
rose aniline, purplish red, deep red
Regular ballpoint pens can be used.
Red
Orange
570
Yellow
As in fax scanners, it’s difficult
to see with human eyes
→
should be avoided.
Regular ballpoint pens can be used.
530
Blue
Regular ballpoint pens can be used for
Green
blue(includes Green)-end colors only.
OMR glossary
Dropout color for the reading sensor
The print colors that experience dropout at the peak sensitivity wavelengths for
the image reading sensor are given in the table below.
If wishing to avoid dropout in printable areas such as text areas during image
reading, select a peak sensitivity wavelength that differs from that for the print
color.