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AYDEMİR, CEM

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AYDEMİR

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2010 - 20132
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Author: AYDEMİR, CEM × Subject: ALKYL KETENE DIMER ×

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    Effects of matte coating on the paper surface and print density
    (WALTER DE GRUYTER GMBH, 2013) AYDEMİR, CEM; Aydemir, Cem; Ozomay, Zafer; Karademir, Arif; Kandirmaz, Emine Arman
    In this work, standard laboratory printing applications with IGT (ISO 12647-2) were applied on uncoated and matte-coated papers using offset inks (DIN ISO 2846-1). Surface roughnesses of uncoated and coated sheets were recorded to be 195 and 13 ml/min, respectively. Air permanence values of uncoated and coated papers were found to be 5.6 and 0.103 mu m/Pa.s, respectively. Changes in the print densities were recorded up to 48 h. Print density changes for uncoated and matte-coated papers were surprisingly found to be in similar paths (8% in the first 4 h), although significant differences between surface roughnesses were recorded. Furthermore, paper samples showed similar behaviors for the percent volume changes, where drop volume disappeared within 6 min. It is concluded that matte coating did not have any significant effects on print density change and drop volume change.
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    Effects of Filler Content and Coating on the Water and Oil-Based Ink Interactions with a Paper Surface
    (TAYLOR & FRANCIS AS, 2010) AYDEMİR, CEM; Aydemir, Cem; Karademir, Arif; Imamoglu, Sami
    The effects of filler and coating on the behaviors of water and oil-based ink on the paper surface were investigated. Fillers reduced the air permeability and surface energy hence increased the liquids uptake. The coating was more effective than the internal addition of fillers for the improvement of water and ink absorption. Sizing interfered with the fillers, but had negligible effects on the movements of oil-based ink on papers. The quality of coating in terms of printing performance was dependent on the improvement of surface smoothness, microcapillary formation and the absorption properties of fillers in the coating layer.