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Full-Text Articles in Engineering
The Influence Of Fiber Swelling On Paper Wetting, Sedef Akinli-Kocak
The Influence Of Fiber Swelling On Paper Wetting, Sedef Akinli-Kocak
Electronic Theses and Dissertations
The water uptake behavior of fibers, especially those at the surface of paper, influences printing and coating operations. The dynamic water uptake behavior of the surface fibers may determine the initial consolidation of the coating at the surface and the penetration of coating into the paper, but clear studies on this topic have not been reported in the literature. Four different fiber types and seven different paper sheets were investigated in the present study. The three different fiber types were prepared by carboxymethylation of softwood kraft pulp thereby producing pulps with different water uptake values. The fiber length and water …
Gloss Dynamics Of Inkjet Printers, Amol G. Shirke
Gloss Dynamics Of Inkjet Printers, Amol G. Shirke
Electronic Theses and Dissertations
Inkjet printing is a popular non-impact technology with widespread use in home and office applications. The basic principle involves propelling ink drops of different colors on a substrate. High quality images, near photographic quality, are now possible. The gloss of the printed substrate is an important quality attribute. Printed gloss depends on a number of characteristics of the media and the ink, but a good fundamental understanding is not available in the literature. The dependence of the gloss on the media and ink characteristics is reported in this work. The experimental results are compared with values predicted by a mathematical …
Micro-Probe For Physical And Chemical Surface Analysis, Joshua Mathews
Micro-Probe For Physical And Chemical Surface Analysis, Joshua Mathews
Electronic Theses and Dissertations
Non-uniform porosity of paper and coated paper is important in printing and paper making industries. Current porosity measurements give results averaged over a large area. A new method is developed to determine local variations in porosity and surface chemistry. A measured volume of a probe liquid is applied to a hemispherical glass probe. The substrate of interest is brought into contact with the fluid drop. The resulting liquid bridge exerts a force on the probe due to surface tension forces. A video camera is used to visually correlate the physical phenomena with the force-time data. The force-time data is recorded …