Operating instructions

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(5) Colors that can be used as dropout colors differ depending on the model,
but with some models, even regular ballpoint pen ink drops out and
cannot be used. In such cases, you need special OCR ballpoint pens
that are rarely available today. See table below for relationships between
wavelengths and colors.
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.)
b) If you want to use an abundance of colors, we recommend printing in
ink other than dropout colors as a “black frame sheet.”
No feed
Refers to paper doesn’t get fed during paper feeding operations.
If such an error occurs, the device assesses it as a paper feeding error, and
notifi es user of the error.
PCS (printed contrast signal)
Refers to the refl ectance ratio (contrast) of printed marks, symbols, and letters as
opposed to refl ectance of non-printed areas. The calculation formula is as follows.
PCS =
White refl ectance - black refl ectance
White refl ectance
When reflectance of areas with no printing is 70%, and reflectance of printed
marks, symbols, and letters is 10%, the PCS will be 0.857.
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 diffi cult
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-end colors only. Green
OMR glossary
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