Technical data

Appendices
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11
A 1 – 1.5.2
Appendix A
1 Formulas and terms
1.1 Remission, R
R = Φ
1 /
Φ
0
[ 0 ≤ R ≤ 1 ] Φ
0
: Luminous flux before sample
Φ
1
: Luminous flux after sample
R = 10
-D
D: Density
1.2 Density, D
D = log
10
( 1 / R )
D = - log
10
( R )
1.3 Density difference, ∆D
∆D = D
Meas
- D
Ref
∆D: Density difference
D
Meas
: Density measurement value
D
Ref
: Density reference value
1.4 Dot gain, G
G = A%Print - A%Film A%Print: Dot area of print
A%Film: Dot area of film
1.5 Dot area, A
1.5.1 Dot area according to Murray-Davies
1 - 10
-D
R
D
R
: Density of halftone patch
A % pos =  x 100% D
V
: Density of solid tone patch
1 - 10
-D
V
1.5.2 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 coefficients