Effects on print quality of varying acrylic binder types in water-based flexographic ink formulations / Sinan Sonmez in COLORATION TECHNOLOGY, Vol. 139, N° 3 (06/2023)  

[article]  inCOLORATION TECHNOLOGY > Vol. 139, N° 3 (06/2023) . - p. 330-337 Titre : Effects on print quality of varying acrylic binder types in water-based flexographic ink formulations Type de document : texte imprimé Auteurs : Sinan Sonmez, Auteur ; Dania Alsaid, Auteur ; Alexandra Pekarovicova, Auteur ; Paul D. Fleming III, Auteur ; Matthew T. Stoops, Auteur Année de publication : 2023 Article en page(s) : p. 330-337 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cyan Le cyan est, par définition, la couleur primaire complémentaire du rouge, dans la synthèse soustractive des couleurs utilisée en photographie argentique en couleurs et en imprimerie. Encre en phase aqueuse Encre flexographique Formulation (Génie chimique) Liants en phase aqueuse Polyacryliques Index. décimale : 667.3 Teinture et impression des tissus Résumé : The ink industry is one of the world's largest markets due to the increasing demand for printing inks for the packaging industry. Flexography printing is a well-known promising technology for large-area printing due to its high printing speed and roll-to-roll capability to print economically on a variety of surfaces and is used in nearly in all areas of packaging printing. Water-based inks are considered non-toxic, odourless, and more environmentally friendly options compared to solvent-based inks. Therefore, in this article, the goal was to develop new water-based ink formulation with different acrylic binders for flexographic printing on commercial solid bleached sulphate (SBS) board. Five inks were formulated with four different acrylic binders and compared to a commercially available ink to study their performance. The developed inks were investigated with regard to their print qualities and print characteristics. It was found that the binder type influenced some print quality while the effect was not significant for others. Using flexography printed cyan inks, the ink formulated with the highest molecular weight had the lowest print density and the largest tonal value increase (TVI) observed between 40 and 60 tone values. The same ink had the largest mottle values and variation in topography. For values of print contrast and delta gloss at 75°, although differences were observed between average values, data had inconclusive variation and spread around averages, where no conclusive trends or effects of acrylic binder type on these response factors were observed. Print chroma and dot roundness results were equally close for all printed samples. Note de contenu : - Ink formulation - Printing conditions - Table 1 : The optical and physical properties of solid bleached sulphate (SBS) board - Table 2 : The physical and chemical properties of pigment dispersion - Table 3 : The chemical properties of acrylic resins used in ink formulations - Table 4 : A standard water-based flexographic ink formulation - Table 5 : The CIE L*a*b* colour values of printed test samples - Table 6 : Print topography and mottle properties of printed test samples - Table 7 : Dot measurements of 15% screen dots of printed test samples - Table 8 : Print rub resistance properties of printed test samples DOI : https://doi.org/10.1111/cote.12650 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12650 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39542 [article]

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New generation of inks for rotogravure / Alexandra Pekarovicova in PAINTINDIA, Vol. LII, N° 8 (08/2002)

[article]  inPAINTINDIA > Vol. LII, N° 8 (08/2002) . - p 85-92 Titre : New generation of inks for rotogravure Type de document : texte imprimé Auteurs : Alexandra Pekarovicova, Auteur ; James Atkinson, Auteur ; Jan Pekarovic, Auteur ; Viera Khunova, Auteur Année de publication : 2002 Article en page(s) : p 85-92 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The environmental and health problems caused by inks containing volatile organic compounds (VOC) call for new solutions in printing ink chemistry and technology. One of the approaches may be hot melt ink, which is ink solid at ambient temperature and liquid at the moment of printing. Such ink contains no volatile solvent to be trapped in ink film or to produce VOC. In this work, hot melt ink for rotogravure printing process based on ethylene vinyl acetate (EVA) chemistry was formulated, analyzed for rheological properties, and printed on publication and packaging substrates. The original inks based on ethylvinylacetate and polyethylene (PE) chemistry were too viscous for rotogravure. The polymer matrix was mixed into the carnauba wax and then the rheology was tested again. Carnauba wax significantly decreased the viscosity of hot melt formulations. Drawdowns were made on publication (supercalendered grade A and lightweight coated) and packaging (SBS board) substrates and then the printability data was collected. The EVA/carnauba wax inks showed slightly higher optical density than PE inks.Print gloss, delta gloss and rub resistance properties were better on FE inks. Also, mottling was lower at FE inks. SBS board exhibited highest print and delta gloss and lowest mottle index Note de contenu : - Printing and printability analysis Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12400 [article]

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Phase-change inks / Alexandra Pekarovicova in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 936 (01/2003)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 75, N° 936 (01/2003) . - p. 65-72 Titre : Phase-change inks Type de document : texte imprimé Auteurs : Alexandra Pekarovicova, Auteur ; Hrishikesh Bhide, Auteur ; Paul D. Fleming ; Jan Pekarovic Année de publication : 2003 Article en page(s) : p. 65-72 Note générale : Bibliogr. Langues : Américain (ame) Tags : Formulation  Encre  Impression  jet  encre  en  creux  Hot  melt  Changement  phase  Matériau  PCM Index. décimale : 667.9 Revêtements et enduits Résumé : Phase-change, or hot melt, inks are solid at ambient temperature and liquid at the moment of printing. Such inks contain no volatile solvent to be trapped in ink film or to produce Volatile Organic Compounds (VOC). The phase-change inks found application in non-impact printing technology by either thermal transfer or solid ink digital printing. The environmental and health problems caused by inks containing volatile organic compounds, such as toluene, call for new solutions in the rotogravure printing industry. Because of their low VOC content, phase-change inks might be a reasonable solution for gravure printing. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5613 [article]

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Usability of cellulose-based binder in water-based flexographic ink / Sinan Sonmez in COLORATION TECHNOLOGY, Vol. 139, N° 3 (06/2023)  

[article]  inCOLORATION TECHNOLOGY > Vol. 139, N° 3 (06/2023) . - p. 239-247 Titre : Usability of cellulose-based binder in water-based flexographic ink Type de document : texte imprimé Auteurs : Sinan Sonmez, Auteur ; Abdus Salam, Auteur ; Paul D. Fleming III, Auteur ; Alexandra Pekarovicova, Auteur ; Qingliu Wu, Auteur Année de publication : 2023 Article en page(s) : p. 239-247 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Encre flexographique Formulation (Génie chimique) Liants en phase aqueuse Index. décimale : 667.3 Teinture et impression des tissus Résumé : Packaging must have a good commercial appearance and is generally obtained by ink transferred to its substrate. It is important that the ink used in packaging printing is produced from environmentally friendly and sustainable raw materials as well as being suitable for the printing system. The increasing demand in the field of printed packaging and the scarcity of resources to meet this demand have accelerated the search for new sources for inks. For this purpose, inks produced in the laboratory using a modified cellulose-based binder, a commercial acrylic resin and a commercial soybean protein were compared with a commercial ink. As a result of the study, it was determined that the printability properties of the ink obtained by using the modified cellulose-based binder were better than the ink obtained with commercial soybean protein. It was determined that it showed printability properties close to the ink produced with commercial acrylic binders. By using modified cellulose-based water-based flexographic ink instead of other commonly used binders, more environmentally friendly sustainable inks can be produced. Note de contenu : - METHODOLOGY AND MATERIAL : Ink formulation - Printing conditions - RESULTS AND DISCUSSION : Print density - Print contrast - Specular gloss - The CIE L*a*b* colour values and ΔE - Tone value increases (TVIs) - Dot roundness - Print topography and mottle - Table 1 : Optical and physical properties of a commercial SBS board - Table 2 : Pigment dispersion physical and chemical properties - Table 3 : ProSoy powders physical and chemical properties - Table 4 : Soy vehicle formulation - Table 5 : A standard water-based flexographic ink formulation - Table 6 : Print density of test samplesTABLE 7. Print contrast of test samples - Table 8 : Specular gloss of test samples - Table 9 : The CIE L*a*b* colour values of test samples - Table 10 : Dot measurements of 15% screen dots - Table 11 : Print topography and mottle properties of test samples DOI : https://doi.org/10.1111/cote.12643 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12643 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39535 [article]

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