Influence of Screen Ruling and Engraving Needle Tip Angle on Ink Transfer for Gravure

2010 ◽  
Vol 174 ◽  
pp. 215-218 ◽  
Author(s):  
Pu Jun Deng ◽  
Gai Mei Zhang ◽  
Yu Wang ◽  
Wei Fang
Keyword(s):  
Standard Test ◽  
Gravure Printing ◽  
Uniform Thickness ◽  
Printing Quality ◽  
Dot Gain ◽  
Ink Transfer

Gravure printing is widely applied in packaging printing and the ink transfer is very important for printing quality. Ink transfer affects the ink uniform, thickness and dot gain, so it is necessary to optimize the parameter of the gravure plate making. At present, some investigations are developed for the ink transfer only qualitatively. In this paper, the influence of screen ruling and engraving needle tip angle on ink transfer is researched experimentally. Firstly, the standard test gravure plate was prepared, and then the gravure plates are engraved at different parameter combining the screen ruling and engraving needle tip angle. Finally, the printing samples are obtained, from which the transfer amount and the density are measured. This paper, the amount of ink transfer and the density are investigated, and the results show that screen ruling and engraving needle tip angle affect the ink transfer amount.

The Effect of Emulsification Ratio on Ink-Transfer Performance and Printing Quality of UV Offset Ink

2011 ◽  
Vol 380 ◽  
pp. 77-80
Author(s):  
Xiao Xu Ma ◽  
Xian Fu Wei ◽  
Bei Qing Huang ◽  
Wan Zhang
Keyword(s):  
Transfer Equation ◽  
Performance Test ◽  
Transfer Performance ◽  
Solid Density ◽  
Printing Quality ◽  
Dot Gain ◽  
Relative Contrast ◽  
Set Up ◽  
Ink Transfer

The emulsification ratio of ink has an important effect on ink-transfer performance and printing quality. The UV offset ink of gold and silver cardboard was prepared by three-roll grinder. Ink was emulsified by adding different amounts of water and the ink samples with different emulsification ratio were made. Printability tester was used to proof, test the ink transfer performance, set up Ink transfer equation, confirm the parameters of f’，b and k, and investigate the influence of emulsification ratio on ink-transfer performance. Test the solid density, dot gain and relative contrast value of proofs, analyze the effect of emulsification ratio on printing quality. The research results show that when the ink of plate was large, the amount of ink transfer and the volume of ink on the plate are basic in a linear relationship. When the emulsification ratio of ink is 11.76%, the value b, the solid density and relative contrast value are the biggest. When the emulsification ratio of ink is 6.25%, the value f’ is the biggest. The dot gain is the smallest while the emulsification ratio is 15.67%.

Study on the Influence of Rheological Properties on the Printing Quality of Ink

2011 ◽  
Vol 284-286 ◽  
pp. 2018-2021
Author(s):  
Xiao Xue Jia ◽  
Bei Qing Huang ◽  
Xian Fu Wei
Keyword(s):  
Rheological Properties ◽  
Transfer Rates ◽  
Solid Density ◽  
Printing Quality ◽  
Yield Value ◽  
Dot Gain ◽  
Ink Transfer

Design the formula of UV waterless offset ink, through changing the content of padding, different ink samples that with different rheological properties were made. Proof with the IGT printability tester, and the printing qualities of inks were tested. The influence of rheological properties on the printing quality of ink was analysis. The results show that the rheological properties influence the printing quality directly. The higher the viscosity of ink is, the bigger the thixotropy is, and the smaller the fluidity is. The solid density, gloss, ink-transfer rates and dot gain of the printed matter decrease with the increase of ink’s yield value.

Effect of Paper’s Spectral Reflectance on the Printing’s Dot Gain

2011 ◽  
Vol 236-238 ◽  
pp. 1246-1249
Author(s):  
Chen Fei Zhao ◽  
Qing Han
Keyword(s):  
Spectral Reflectance ◽  
Color Patch ◽  
Color Reproduction ◽  
Print Material ◽  
Printing Quality ◽  
Dot Gain ◽  
Light Color ◽  
Area Percentage

Paper is the main print material, whose performance is a factor that effects the printing’s dot gain which is bad to image clarity and color reproduction. In the paper, Yule-Nielsen neugebauer spectral modal is analyzed , and the relation between paper’s spectral reflectance and the printing’s dot gain is discussed. By experiments, the paper’s spectral reflectance is adopted as correction index, which can reduce the dot gain value of the light color patch , and in the same printing conditions the dot gain is effected by the paper’s spectral reflectance, ink’s type, dot area percentage and wavelengths. The research has a certain significance for controlling printing quality and reducing the producing cost.

Parameter Study of Offset Press Cylinder Based on Sliding Friction

2010 ◽  
Vol 174 ◽  
pp. 299-302 ◽  
Author(s):  
Hai Yan Zhang ◽  
He Ping Hou ◽  
Jun Feng Si ◽  
Xiao Yu Chen
Keyword(s):  
Contact Area ◽  
Sliding Friction ◽  
Accurate Determination ◽  
Rolling Process ◽  
Elastic Cylinder ◽  
Parameter Study ◽  
Cylinder Radius ◽  
Printing Quality ◽  
Dot Gain

In the contact area of offset, a relative slide occurs between the surface of plate cylinder and blanket cylinder, which changes the print image and influences the printing quality. The relative slide in the cylinders’ rolling process is investigated, and the determination rule of cylinders’ geometric parameters of offset press is proposed. The results show that the relative slide is minimization under the condition that the compression of elastic cylinder radius is 0.2 times bigger than that of rigid cylinder radius, and the deformation of print image and dot gain both are minimization. The results provide theoretical direction for accurate determination of cylinder radius of offset press.

A Study of Color Variance between Vacuum Plate of Aluminum and Aluminum Foil Using UV Offset Printing

2012 ◽  
Vol 262 ◽  
pp. 253-257
Author(s):  
Chang Lang Chen ◽  
Mei Chun Lo ◽  
Ming Chw Wei ◽  
Shi Wei Wang
Keyword(s):  
Aluminum Foil ◽  
Packaging Materials ◽  
Offset Printing ◽  
Color Gamut ◽  
Test Form ◽  
White Board ◽  
Printing Quality ◽  
Dot Gain ◽  
Green Packaging ◽  
The Difference

In packaging market, Vacuum Plate of Aluminum by UV offset printing is light impediment effectively, moisture-proof, and forgery-proof and reaches the request of the green packaging production. Thus, the packaging of Vacuum Plate of Aluminum is used widely. This study was a true experimental research. The test form employed was the printing quality control strip from international printing specification. It was used to record and analyze the color variance between Vacuum Plate of Aluminum and Aluminum Foil with white board and no white board using UV Offset Printing. The study indicated the comparison of Tone Value Increased & the difference of Color Gamut Range among these three packaging materials via C, M, Y, K four colors tone value and RGB area testing, and results reveals that the tone value on the Vacuum Plate of Aluminum with white board increased most among these three materials; the dot gain percentage of the Vacuum Plate of Aluminum is less than 15% which with the highest stability than others. All signature findings are given in Fig.1 and Fig.2. These results are entirely consistent with research hypotheses.

Influence of Monomer on the Transfer Properties of UV Waterless Offset Ink

2012 ◽  
Vol 200 ◽  
pp. 719-723
Author(s):  
Bei Qing Huang ◽  
Xiao Xue Jia ◽  
Xian Fu Wei ◽  
Ling Ya Gu ◽  
Biao Fan
Keyword(s):  
Rheological Properties ◽  
Transfer Equation ◽  
Transfer Rate ◽  
Large Impact ◽  
Transfer Performance ◽  
Transfer Experiment ◽  
Printing Quality ◽  
Yield Value ◽  
Ink Transfer ◽  
Transfer Properties

Four kinds of monomers were chosen to prepare ink to research the effect of monomer on the ink transfer performance of UV waterless offset and improve the printing quality. The rheological properties such as viscosity, yield value, thixotropy and stickiness were tested and the ink transfer equation was built, the ink transfer rate was calculated and the effect of monomer on the ink transfer performance was analyzed through the ink transfer experiment. The research results show that the type of monomers has large impact on the rheological properties of UV waterless offset, so the ink transfer performances with different kinds of monomers are different. And the viscosity, thixotropy, yield value and stickiness of the ink with TPGDA and EOEOEA are little, the ink transfer performance is better.

A Novel Method to Qualify the Status of Printing Process Rapidly

2010 ◽  
Vol 174 ◽  
pp. 203-206 ◽  
Author(s):  
Ying Wang ◽  
Hao Xue Liu ◽  
Min Huang
Keyword(s):  
Test Results ◽  
Single Test ◽  
Test Sheet ◽  
Solid Density ◽  
Printing Quality ◽  
Dot Gain ◽  
The Status ◽  
Density Values ◽  
Novel Method ◽  
Printing Ink

According to the characteristics of ink feeding and printing quality control principles, a new test sheet was designed for qualifying press state and the test results were discussed in this paper. This test sheet was printed under the condition that printing ink volume for different ink zone is identical. Solid density, dot gain and print contrast of different printing ink volume were simulated on a single test sheet, and thus the optimal printing status can be determined quickly. Experiment results show that this method is accessible, economic, and rapid. The optimum solid density values can be got easily for all primary colors on a single test sheet. This method is suit for the adjustment of printing status.

Research on Friction between Gravure Roller and Scraping Blade

2013 ◽  
Vol 469 ◽  
pp. 399-403 ◽  
Author(s):  
Jian Dong Lu ◽  
Gai Mei Zhang ◽  
Lian Fang Li
Keyword(s):  
Qualitative Research ◽  
Gravure Printing ◽  
Blade Angle ◽  
Machine Vibration ◽  
Printing Quality ◽  
Run Time ◽  
Printing Machine ◽  
Printing Speed

A variety of friction exists during gravure printing machine run-time. The friction between gravure roller and scraping blade has a great effect on the printing quality and gravure printing endurance. In this article, the friction between gravure roller and scraping blade is studied from the micro-contact perspective. The qualitative research of the factors that affect the friction between gravure roller and scraping blade is done, in order to confirm the effect law of the printing speed, scraping blade angle and gravure printing machine vibration on the friction between gravure roller and scraping blade.

Sign in / Sign up

Export Citation Format

Share Document