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● AP-1
APPENDIX 1 DROP-OUT COLOR
A drop-out color is a color visible by a human eye but not visible to the scanner.
To check the grounding color of document for a drop-out color, use the method and follow the
standards given below.
Print density measurement
The measurement must be made in one of the following ways:
-
A light source using fluorescent.
- Macbeth PCS meter PCM II is used, which requires a filter.
Drop-out color standard
In the spectrum of fluorescent lamp the PCS value must satisfy the following standards:
-
Maximum: 0.14 or less
- Average: 0.1 or less
400
0
10
20
30
40
50
60
70
80
90
100
500 600 700
Wave Length (nm)
Relative Spectral Power