Soft Proofing of printed colours on substrates with optical brightening agents

2011 ◽  
Author(s):  
Nikhil Parab ◽  
Phil Green
Keyword(s):  
Soft Proofing ◽  
Optical Brightening Agents

Evaluation and Controlling Influence of Papers Containing Optical Brightening Agents (OBA) for Color Management

2010 ◽  
Vol 174 ◽  
pp. 8-11
Author(s):  
Quan Hui Tian ◽  
Zhen Liu
Keyword(s):  
Color Management ◽  
Printing Industry ◽  
Conversion Method ◽  
Soft Proofing ◽  
Optical Brightening Agents ◽  
Almost All

Color management has been applied in the printing industry since 1993. Press papers as one of traditional substrates, its properties impact the quality of color reproductions. At present, almost all kinds of papers contain OBA. OBA works by absorbing ultraviolet wavelengths of the illuminant, emitting fluorescence at blue wavelengths, increasing the amount of light, and making the paper brighter. This effect of OBA is difficult to measure with common spectrophotometers accurately, which creates a mismatch between color proofing and printing. Furthermore, both the printing standards, as ISO 12647-2 defined substrate without fluorescence. It results in some problems in printing conformance using paper with OBA. This research discovered influence of OBA to color samples, derived colorimetric conversion method to correct and compensate the effects of OBA in papers, and demonstrated the efficient of the colorimetric conversion method in color management workflow with soft proofing.

Research and Application on Screen Soft Proofing Technology in Printing Quality Control

2012 ◽  
Vol 262 ◽  
pp. 263-268
Author(s):  
Zhan Jun Si ◽  
Jia Wang ◽  
Chong Gu
Keyword(s):  
Quality Control ◽  
Good Effect ◽  
Color Management ◽  
Actual Situation ◽  
Testing Scheme ◽  
Printing Quality ◽  
Display Technology ◽  
Soft Proofing ◽  
Display Performance

In recent years, screen soft proofing has matured with the development of color management and display technology, and it has become the direction of printing development and the key of promotion. This article aimed at raising a testing scheme of display performance and adjusting scheme of corresponding display parameters, on this account to test the professional display’s performance, adjust display parameters and make color management. At the same time with reflecting the actual situation of display, a stable and accurate color reproduction environment was provided for screen soft proofing. After that, evaluations were carried out to evaluate printing quality of screen soft proofing on the condition that display’s performance was good, consequently the differences between proofing effects and final printing were studied. The result shows that this testing scheme of display performance can reflect the truth of display which is tested in this paper, the display after adjusted and color management according to this scheme shows good effect in the ability of screen analog proofing original, it can approach the requirements of the printing proofing.

Interactions of Lignin with Optical Brightening Agents and Their Effect on Paper Optical Properties

2014 ◽  
Vol 53 (8) ◽  
pp. 3091-3096 ◽  
Author(s):  
Hongbin Liu ◽  
He Shi ◽  
Yating Wang ◽  
Wei Wu ◽  
Yonghao Ni
Keyword(s):  
Optical Properties ◽  
Optical Brightening Agents

Color performance of monitor used in soft proofing

2018 ◽  
Vol 33 (4) ◽  
pp. 285-290
Author(s):  
万 勇 WAN Yong ◽  
郑元林 ZHENG Yuan-lin ◽  
游伴奏 YOU Ban-zou
Keyword(s):  
Soft Proofing

A LCD Color Calibration Model Based on Gamut-Division Algorithm

2015 ◽  
Vol 731 ◽  
pp. 49-52
Author(s):  
Yin Zhang ◽  
Mao Hai Lin
Keyword(s):  
Liquid Crystal Display ◽  
Color Space ◽  
Color Difference ◽  
Calibration Method ◽  
Calibration Model ◽  
Division Algorithm ◽  
Model Based ◽  
Color Calibration ◽  
Soft Proofing ◽  
Color Rendering

The accuracy of color appearance of displayed image on a liquid crystal display (LCD) is the fundamental to guarantee good results in the soft proofing and cross-media color reproduction. Since the color rendering mechanism of LCDs is different from cathode-ray tube (CRT) displays, the traditional color calibration method cannot turn a very good result. In this paper, a LCD color calibration model based on gamut-division algorithm is proposed using spline method through the analysis of its color rendering mechanism. The monitor 3D gamut is firstly divided along the axis of L* in CIELAB color space according to the hue angle, and then an optimal color calibration matrix of the sub-gamut is computed with mathematical method. The experimental results show that the average color difference, the maximum color difference and hue shift are reduced compared with the traditional method.

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