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Color Reproduction on High Density Printing. Doosan Chung, DaimuYasuhira, Nippon Heihan Kizai Takei, IGU Kinoshita 2007-02-07. 1、 Introduction Web Offset Test IPCC (Intergovermental Panel Climate Change) Sustainability. 1、 Yellow Ink (Red Shift) 2、 Magenta, Cyan 3、 RI Tester

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Color Reproduction on High Density Printing

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Color reproduction on high density printing

Color Reproduction on High Density Printing

Doosan Chung,


Nippon Heihan Kizai Takei,

IGU Kinoshita


2007-2-7 IGU

Introduction web offset test climate change sustainability

1、IntroductionWeb Offset TestIPCC(Intergovermental Panel Climate Change)Sustainability

1、Yellow Ink (Red Shift)

2、Magenta, Cyan

3、RI Tester

4、Ink Transfer Model


6、Korea Color vs. Japan Color

7、High Density Printing (Nova Space,

Wide Color)

2007-2-7 IGU

Preliminary experimental photo1

2、Preliminary Experimental(Photo1)

RI Tester (Akira Manufacturing Co.)

2007-2-7 IGU

Calibration by x rite s photo2

3、Calibration by X-Rite530S(Photo2)





Size=24×5 cm


※ Ink : 韓國特殊INK工業  ;両面ArtPaper

2007-2-7 IGU

Results ink transfer mg from paper weight

4、ResultsInk Transfer (mg) from paper weight

2007-2-7 IGU

Ink transfer quantity

Ink Transfer Quantity

2007-2-7 IGU

Fig 1 yellow ink transfer modified quantity

Fig.1 Yellow Ink Transfer modified Quantity

2007-2-7 IGU

Table1 yellow ink l a b density

Table1 Yellow Ink L*,a*,b* & Density

2007-2-7 IGU

Yellow ink density

Yellow Ink Density

2007-2-7 IGU

Fig 1 2 variation of yellow density

Fig.1-2 Variation of Yellow Density

2007-2-7 IGU

Yellow chromaticity magnified

Yellow Chromaticity magnified




2007-2-7 IGU

Yellow chromaticity

Yellow Chromaticity



1 =1.44

2007-2-7 IGU

Yellow no5 sheet chromaticity

Yellow No5 Sheet Chromaticity

2007-2-7 IGU

Yellow density hue angle

YellowDensity & Hue Angle

2007-2-7 IGU

Fig 2 yellow density

Fig.2 YellowDensity & c*

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Magenta no 5 sample

Magenta No.5 Sample

2007-2-7 IGU

Variation of magenta density

Variation of Magenta Density

2007-2-7 IGU

Magenta no1 no3 no5 sample

Magenta No1,No3 & No5 Sample

2007-2-7 IGU

Fig 3 magenta density hue angle

Fig.3 Magenta Density & Hue Angle

2007-2-7 IGU

Magenta density c

Magenta Density & c*

2007-2-7 IGU

Cyan no5 density

Cyan No5 Density

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Cyan no1 3 5 density chromaticity

Cyan No1,3 & 5 Density & Chromaticity

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Cyan chromaticity diagram

Cyan Chromaticity Diagram

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Fig 4 cyan density hue angle

Fig.4 Cyan Density & Hue Angle

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Cyan density

Cyan Density & c*

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Y m c chromaticity density value

Y,M,C Chromaticity & Density Value

2007-2-7 IGU

Table 2 correlation l c for density and ha

Table 2CorrelationL* & c* for DensityandHA

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Y m c chromaticity diagram

Y,M,C Chromaticity Diagram

2007-2-7 IGU

Fig 5 ri tester no 5 jcp2001

Fig.5 RI Tester No.5 & JCP2001

2007-2-7 IGU

Nova space image from daimu

Nova Space Image From Daimu

2007-2-7 IGU

Ri tester no 1 no 5 novaspace

RI Tester No.1,No.5 & NovaSpace

2007-2-7 IGU

Fig 6 nova space wide color ri tester no 3

Fig.6Nova space, Wide Color & RITester No.3

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Photo3 comparison with wide color a1 175 line a2 printed image

Photo3Comparison with Wide Color(A1) & 175 Line(A2) Printed Image

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A1 a2 c ha difference

A1-A2 c*& HA Difference

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Table4 comparison with ns and wide color

Table4 Comparison with NS and Wide Color

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Table3 ri tester no 5 cmy jcp2001

Table3RI Tester No.5 CMY & JCP2001

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Yellow magnified color diagram j k nova space wide color jcp2001 doosan ri tester

YellowMagnified Color Diagram(J,K)Nova Space, Wide Color,JCP2001,Doosan, RI Tester

2007-2-7 IGU

Red magnified color diagram j k nova space wide color jcp2001 doosan

RedMagnified Color Diagram(J,K)Nova Space, Wide Color,JCP2001,Doosan

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Y m c equations from graph polynomial expression approximate curve d ha

Y,M,C EquationsFrom Graph Polynomial expression approximate curve (D-HA)

y C= 22.735x2 - 62.019x + 283.33

R2 =0.9575

yM = 22.763x2 - 53.929x + 31.311

R2 = 0.9706

y Y= -7.5322x2 + 9.6369x + 89.284

R2 = 0.9887

2007-2-7 IGU

C l diagram

c*-L* Diagram

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1、Correlation for Density Value of Yellow ink (Y) is high for c* and reverse for L*& HA.

2、Increasing Y Ink trend to reddish.

3、These correlations between Ink density & chroma on Y,M,C are order of Y>M>C.

4、The a* minus values of chromaticity Y are under Density=1.

5、The 2nd~4th sheets of each ink are stable in ink transfer.

6、The 2nd Experiment of low density is necessary.

2007-2-7 IGU

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