X-Rite D19C Standard > D19C Full Upgrade Manual de servicio Pagina 154

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Appendices
............................
A 1.6 – 1.9
1.6 Printing plate, A
Dot area according to Yule-Nielsen
1 - 10
- D
R / n
D
R
: Density of halftone patch
A % pos =  x 100% D
V
: Density of solid tone patch
1 - 10
- D
V / n
n: Yule-Nielsen coefficient
1.7 Relative print contrast, C
D
V
-
D
R
D
V
: Density of solid tone patch
C =  x 100% D
R
: Density of halftone patch
D
V
1.8 Trapping, T
D
3
-
D
1
D
1
: First printed color
T =  x 100% D
2
: Second printed color
D
2
D
3
: Overprint
1.9 Greyness, G
D
min
D
min
: Minimum density
G =  x 100% D
max
: Maximum density
D
max
1.10 Hue error, H
D
mean -
D
min
D
min
: Minimum density
H =  x 100% D
max
: Maximum density
D
max -
D
min
D
mean
: Mean density
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