Detection of local specular gloss and surface roughness from black prints

Juuti, Mikko; Prykäri, Tuukka; Alarousu, Erkki; Koivula, Hanna; Myllys, Markko; Lähteelä, Arto; Toivakka, Martti; Timonen, J.; Myllylä, Risto; Peiponen, Kai–Erik

doi:10.1016/j.colsurfa.2006.11.039

Cited by 36 publications

(29 citation statements)

References 16 publications

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“…The technique has been used in several research domains for various applications ranging from plant biology 7 to soil science. 8 Previous studies using X-ray tomography have been performed on thermal barrier coatings, 9 paper 10,11 and cultural heritage. 12 High-resolution X-ray tomography is particularly interesting for the study of wood coatings regarding the structure of the substrate and the average thickness and penetration depth of a coating.…”

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confidence: 99%

High-resolution X-ray imaging and analysis of coatings on and in wood

et al. 2009

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33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Wood coatings are widely used for aesthetic and protective reasons. Assessment of coating performance during service life is crucial in order to establish a knowledge database for product optimization. A vast amount of techniques is available for analysis of a coating's behavior of which micro-imaging is an important tool. In addition to standard microscopy techniques, high-resolution X-ray tomography is presented as a modality offering non-destructive visualization of a coating and the substrate applied on. Combined with analysis of the 3D volumetric data, surface roughness, structure and thickness of the coating layer, penetration depth and related mechanical anchoring can be studied in relation with the underlying substrate. To provide a clear illustration of the possibilities and limitations of this technique, both an opaque solvent-borne and an opaque water-borne coating applied on two different wood types were scanned and analyzed. Clearly, three-dimensional X-ray imaging at high resolution produces valuable information merely by visualization. Moreover by proper analysis quantitative data is obtained taking into account the limitations of Xray computed tomography and of automated image processing.

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confidence: 99%

High-resolution X-ray imaging and analysis of coatings on and in wood

et al. 2009

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“…Bu değer baskının son parlaklık değerini belirler. Bu değer kağıt ya da kartonun yüzey özellikleri ile mürekkep bileşenlerinin etkileşimine bağlı olarak artmakta ya da azalmaktadır [31][32]. Şekil 6'da UV flekso mürekkeplerle basılan yüzeylerde elde edilen delta gloss değerinin su bazlı mürekkep ile basılanlara oranla fark edilebilir oranda yüksek olduğu görülmektedir ki, bu sonuç yüksek bir baskı kalitesi için istenen bir durumdur.…”

Section: Materyal Ve Metodlar (Materials and Methods)unclassified

Ultraviyole Flekso Mürekkeplerin Karboksimetil Selüloz ve Polivinil Alkol ile Kaplanmış Kartonların Basılabilirlikleri Üzerindeki Etkilerinin Karşılaştırılması

Sönmez¹

2017

Journal of Polytechnic

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Politeknik Dergisi, 2017; 20 (4) : 985-991 Journal of Polytechnic, 2017; 20 (4) Comparison of into the Effects of Ultraviolet Flexo Ink on Printability of The Paperboards Coated With Carboxymethyl Cellulose and Polyvinyl Alcohol ABSTRACTThe aim of this work is to compare the effect of Ultraviolet (UV) flexo inks used in the paperboards coated with carboxymethyl cellulose (CMC) and Polyvinyl alcohol (PVOH) on the printing quality. The study was made at two stages. At the first one, the surface sizing prepared using 5 % of carboxymethyl cellulose, 5 and 10 % of PVOH was coated on the surface of base paperboard and fully dried at the room temperature. The surface roughness, contact angles, cobb and gloss values of the coated base paperboard were measured. At the second stage, the test printings using both water based flexo ink and UV flexo ink on the coated base paperboard were carried out. The print density, L*a*b* and gloss values (printed) were evaluated on the printed surface areas in the coated base paperboards. The obtained results showed that the surface smoothness of the paperboards coated by PVOH was better than the one coated using CMC, but their resistance to wetting was smaller. The printing quality between the paperboards coated by PVOH or CMC was not significantly different. The print density, delta gloss and chroma values of printings attained using UV ink were higher compared to water based ink, revealing that the UV inks increased the printing quality.

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“…A Skyscan 1172 system with a voxel size of 0.8 lm was used for imaging. 7 Surface topographies of the both toner and coated paper were segmented from the reconstructed 3D image using a surface-detection algorithm based on the quenched EdwardsWilkinson (qEW) equation. 9 This technique is a slightly simplified version of the so-called snakes model, 10 especially designed for analysis of 3D tomographic images.…”

Section: Methodsmentioning

confidence: 99%

“…[4][5][6] Combining three-dimensional tomographic data and surface topography, the local optical properties of printed paper have been analyzed. 7 It is, however, crucial to be able to determine the base-paper structure and the toner-layer characteristics at the same location since the distribution of ink and the substrate structure both vary appreciably. Often their deviations from their average values are more significant than the mean values themselves.…”

Section: Introductionmentioning

confidence: 99%

X-ray microtomography and laser ablation in the analysis of ink distribution in coated paper

Myllys

Häkkänen

Korppi-Tommola

et al. 2015

Journal of Applied Physics

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A novel method was developed for studying the ink-paper interface and the structural variations of a deposited layer of ink. Combining high-resolution x-ray tomography with laser ablation, the depth profile of ink (toner), i.e., its varying thickness, could be determined in a paper substrate. X-ray tomography was used to produce the 3D structure of paper with about 1 μm spatial resolution. Laser ablation combined with optical imaging was used to produce the 3D structure of the printed layer of ink on top of that paper with about 70 nm depth resolution. Ablation depth was calibrated with an optical profilometer. It can be concluded that a toner layer on a light-weight-coated paper substrate was strongly perturbed by protruding fibers of the base paper. Such fibers together with the surface topography of the base paper seem to be the major factors that control the leveling of toner and its penetration into a thinly coated paper substrate.

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Detection of local specular gloss and surface roughness from black prints

Cited by 36 publications

References 16 publications

High-resolution X-ray imaging and analysis of coatings on and in wood

High-resolution X-ray imaging and analysis of coatings on and in wood

Ultraviyole Flekso Mürekkeplerin Karboksimetil Selüloz ve Polivinil Alkol ile Kaplanmış Kartonların Basılabilirlikleri Üzerindeki Etkilerinin Karşılaştırılması

X-ray microtomography and laser ablation in the analysis of ink distribution in coated paper

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