scholarly journals Paper surface efficiency and inkjet colour reproduction on invasive and agro residue papers

2020 ◽  
Author(s):  
Igor Karlovits ◽  
◽  
Gregor Lavrič ◽  
Keyword(s):  
Inkjet Printing ◽  
Surface Characteristics ◽  
White Paper ◽  
Ultrasound Measurement ◽  
Offset Printing ◽  
Paper Properties ◽  
Paper Surface ◽  
Negative Linear Correlation ◽  
Modified Surface ◽  
Uniform Manner

Paper surface efficiency was developed by Preucil and was intended to define the colourimetry and geometrical part of the light reflection with paper surface values. The surface characteristics of paper, primarily its roughness and absorptivity affect colour reproduction beside the ink pigments or dye. Rougher paper surfaces scatter the light in a more non-uniform manner while paper absorption may cause ink vehicle absorption and thus decreasing gloss, or it may absorb both vehicles and pigment-producing an unexpected colour shift. The formula was upgraded with paper whiteness values as the basic formula did not explain the whole phenomena. These paper properties were the foundation of the paper standardisation for standardised printing. On the other hand, during inkjet printing, a limited amount of liquid is deposited onto a paper surface. When the droplet hits the surface, it starts to spread and wet the surface depending on the ink and paper properties and had different colourant deposition from the formulas used mainly for offset printing inks. In this paper, we have researched the modified surface efficiency formula applied to inkjet printing (HP PageWide Pro 477dw) on invasive and agro-residue papers with specific non-white paper shades. We have measured the dynamic liquid penetration using ultrasound measurement to model the surface behaviour of the inks and measured CIE LCH values of the samples and calculated the CIE ΔE00 colour differences and the influence of paper surface efficiency and paper shade influence on the colour reproduction. The results indicate that using recalculated Cobb Absorption values gives good negative linear correlation with the original formula regarding the magnitude of colour difference.

Alkali-Modified Titanium Surface Stimulating Formation of Bone-Implant Interface

2007 ◽  
Vol 361-363 ◽  
pp. 749-752
Author(s):  
J. Strnad ◽  
Jan Macháček ◽  
Z. Strnad ◽  
C. Povýšil ◽  
Marie Strnadová
Keyword(s):  
Titanium Implant ◽  
Surface Characteristics ◽  
Healing Time ◽  
Machined Surface ◽  
Implant Surface ◽  
Bone Implant ◽  
Bone Response ◽  
Modified Surface ◽  
The Difference ◽  
Titanium Implant Surface

This study was carried out to assess the bone response to alkali-modified titanium implant surface (Bio surface), using histomorphometric investigation on an animal model. The mean net contribution of the Bio surface to the increase in bone implant contact (BIC) with reference to the turned, machined surface was evaluated at 7.94 % (BIC/week), within the first five weeks of healing. The contribution was expressed as the difference in the osseointegration rates ( BIC/'healing time) between the implants with alkali modified surface (Bio surface) and those with turned, machined surface. The surface characteristics that differed between the implant surfaces, i.e. surface morphology, specific surface area, contact angle, hydroxylation/hydration, may represent factors that influence the rate of osseointegration.

Effect of Paper Surface Characteristics on Dot Gain in Ink-Jet Printing

2010 ◽  
Vol 174 ◽  
pp. 227-230 ◽  
Author(s):  
Zhen Cai Qu ◽  
Guang Xue Chen ◽  
Bao Lin Tang ◽  
Shuang Shuang Wen
Keyword(s):  
Experimental Data ◽  
Research And Development ◽  
Surface Characteristics ◽  
Experimental Data Processing ◽  
Paper Surface ◽  
Ink Jet ◽  
Dot Gain ◽  
Jet Printing ◽  
Practical Guidance ◽  
The Law

Four kinds of ink-jet papers with different surface characteristics are chosen in this paper, by the ink-jet proofing experiments, the influence of surface characteristics to dot gain is studied, and the law of dot gain with paper surface characteristics is discussed. During the experiment, surface properties including absorbency, gloss, roughness and whiteness are tested firstly; then, the standard wedge of GATF is printed on these papers in the same printing conditions; finally, the dot gain is tested by SpectroEye. After experimental data processing and analysis, dot gain curves of different ink-jet papers are concluded, the law of dot gain with ink-jet paper surface characteristics is summarized. The results show that dot gain is different in different paper, the evaluation of 3# is the best; dot gain is also different with different colors in the same paper, and it is serious in cyan but light in yellow; the biggest dot gain appears in different contrast with different colors, cyan appears near the 65% dot area. The result of this paper offers a certain theoretical reference and practical guidance to the selection, the research and development of ink-jet paper as well as the improvement of ink-jet qualities.

RF-ARGON PLASMA INDUCED SURFACE MODIFICATION OF PAPER

2008 ◽  
Vol 15 (04) ◽  
pp. 503-508 ◽  
Author(s):  
HALIL TURGUT SAHIN
Keyword(s):  
Surface Modification ◽  
Glow Discharge ◽  
Vapor Phase ◽  
Elemental Carbon ◽  
Treatment Time ◽  
Argon Plasma ◽  
Surface Characteristics ◽  
Chain Scission ◽  
Photo Degradation ◽  
Paper Surface

The radio frequency (RF) argon plasma induced surface modification of paper revealed novel surface characteristics and substantially changed surface topography. It was found that RF-argon glow discharge affects surface properties resulting in photo-degradation and chain-scission mechanism on paper network structure. High-power and extended treatment time caused increasing elemental carbon, while decreasing the oxygen concentration on paper surface. However, increased hydroxyls and the creation of new carbonyl functionalities were verified by trifluoroacetoanhydride and pentafluorophenylhydrazine in vapor-phase derivatization reactions.

Describing the Influence of Ink Type on Ink Penetration and Distribution

2014 ◽  
Vol 881-883 ◽  
pp. 1451-1454
Author(s):  
Ying Li ◽  
Wen Juan Gu ◽  
Bang Gui He
Keyword(s):  
Penetration Depth ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Drying Method ◽  
Offset Printing ◽  
Laser Scanning Confocal Microscope ◽  
Paper Surface ◽  
Printing Quality ◽  
Distribution Uniformity ◽  
Printing Ink

Ink is transferred and sets onto the paper surface in the printing process, which affect printing quality and usage of ink. The objective of this experiment was to investigate the influence of ink type on ink absorption and characterize the penetration depth through quantitative analysis by Laser Scanning Confocal Microscope (LSCM). Fluorescent ink was used to observe and characterize ink penetration by LSCM. Three-dimensional images of ink pigment penetration were obtained by reconstructing all XY plane images. It could be concluded Common offset printing ink compared with UV offset printing resulted in deeper ink penetration ,uneven ink distribution and lower print density. Because the composition and drying method of UV offset printing ink and common offset printing ink were significant different, penetration depth and distribution uniformity of these two types of offset printing ink in coated paper were distinct.

The Revision of Paper Surface Efficiency and its Influences on Printing Qualities

2014 ◽  
Vol 881-883 ◽  
pp. 1743-1746
Author(s):  
Yong Gang Yang ◽  
Qiao Zhuo Gao
Keyword(s):  
Experimental Data ◽  
Density Measurement ◽  
Color Reproduction ◽  
Paper Properties ◽  
Paper Surface ◽  
Color Effect ◽  
Linear Relationships ◽  
Paper Property

Paper surface efficiency (PSE), a paper property integrating gloss and absorbency, can be used to evaluate color reproduction after the interaction of paper and ink. But it was shown that the color reproduction was still related to paper whiteness in practice. In this paper, an assumed PSE formula which integrates gloss, whiteness and ink absorbency is firstly presented, and according to experimental data, it can be well forecasted that the change of these principal paper properties would affect color reproduction result via the new PSE formula. The linear relationships between new PSE formula and ink color reproduction based the description of photo-density measurement were studied subsequently. The results showed that new PSE formula can be used to predict effectively ink color effect.

scholarly journals A method of cooling capacity enhancement of ceiling panel

2019 ◽  
Vol 116 ◽  
pp. 00099
Author(s):  
Janusz Wojtkowiak ◽  
Łukasz Amanowicz
Keyword(s):  
Energy Demand ◽  
Flat Surface ◽  
Cooling Capacity ◽  
Cooling Power ◽  
Paper Surface ◽  
Capacity Enhancement ◽  
Cooling Devices ◽  
Modified Surface ◽  
Near Future ◽  
Cooling Energy Demand

The cooling energy demand in the buildings is quite large nowadays and it will increase rapidly in the near future. Therefore, capacity of existing cooling devices must be increased. In this paper surface corrugation as a method of capacity enhancement of ceiling panels is theoretically investigated. A subject of the analysis is the effect of corrugation length L and corrugation angle β on the panel’s cooling capacity. It is shown that in the typical conditions the cooling power of the panel with modified surface can achieve even 153 W/m2 and it is about up to 2.5 times higher than the power of a reference panel with flat surface.

Influence of paper surface characteristics on fully inkjet printed PEDOT:PSS-based electrochemical transistors

2021 ◽  
Author(s):  
Rogério Miranda Morais ◽  
Douglas Henrique Vieira ◽  
Cristina Gaspar ◽  
Luis Pereira ◽  
Rodrigo Ferrão de Piva Martins ◽  
...  
Keyword(s):  
Surface Characteristics ◽  
Paper Surface

Evaluation of cut quality of woodfree coated papers

TAPPI Journal ◽  
2013 ◽  
Vol 12 (9) ◽  
pp. 9-15
Author(s):  
BENOÎT DUFOUR, ◽  
WOLFGANG BAUER ◽  
JEAN-FRANCIS BLOCH
Keyword(s):  
Coating Layer ◽  
The State ◽  
Point Of View ◽  
Test Method ◽  
Offset Printing ◽  
Paper Properties ◽  
Coated Papers ◽  
Cut Quality ◽  
Printing Papers

Dusting and blanket pollution are of particular interest in offset printing. Papers must be free of dust and loose particles to drastically reduce the wash interval of the blankets. Those particles are mainly generated during converting operations, such as sheeting. Considering the end-customer point of view, the visual aspect of the cut appears to be very important. To study in detail the influence of the sheeting parameters and paper properties on cut quality, a new test method to quantify the cut quality of woodfree coated papers has been developed. In particular, this method takes into consideration the state of the coating layer near the cutting edges.

Thin coatings for paper by foam coating

TAPPI Journal ◽  
2014 ◽  
Vol 13 (7) ◽  
pp. 9-19 ◽  
Author(s):  
KARITA KINNUNEN-RAUDASKOSKI ◽  
TUOMO HJELT ◽  
EIJA KENTTÄ ◽  
ULLA FORSSTRÖM
Keyword(s):  
Pilot Scale ◽  
Coating Materials ◽  
Coating Technology ◽  
Paper Properties ◽  
Thin Coatings ◽  
Paper Surface ◽  
Ultrathin Layers ◽  
Coating Method ◽  
Coating Methods ◽  
New Type

The future of paper products is predicted to lie in intelligent and functional paper properties. These properties are achieved by using coating materials, which are usually very expensive, but the amount needed is also very small. The application of these small amounts requires a new type of coating method; conventional coating methods used in the industry today are not capable of providing ultrathin layers. In this study we introduce foam coating, a technology widely used in the textile and nonwovens industries. Foam coating technology offers a unique opportunity to apply coating on the web surface thinly enough to be economically viable. Our pilot-scale studies show that a thin coating of nanomaterial at a thickness of 1 μm or less and coat weight of 0.3-2.0 g/m2 is enough to change paper surface properties and enable the functionalization of the paper surface. This report describes the applicability of the curtain-like foam coating technology in unmodified cellulose nanofiber (CNF) applications.

Study on Surface Characteristics of Vacuum Aluminized Paperboard

2013 ◽  
Vol 416-417 ◽  
pp. 1666-1670
Author(s):  
Le Cao ◽  
Yi Zhang
Keyword(s):  
Surface Characteristics ◽  
Coated Paper ◽  
Paper Surface ◽  
Contrast Materials ◽  
Major Surface

In order to obtain surface characteristics of vacuum aluminized paperboard, this paper illustrated the structure of vacuum aluminized paperboard. By setting coated paper and gold card paper as the contrast materials, it mainly studied several major surface characteristics of vacuum aluminized paperboard, such as glossiness, smoothness, ink absorbency and paper surface efficiency, which has provided reference for production and application of vacuum aluminized paperboard.

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