Consistent determination of the contrast ratio of white inks / Danny C. Rich in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1501-1509 Titre : Consistent determination of the contrast ratio of white inks Type de document : texte imprimé Auteurs : Danny C. Rich, Auteur Année de publication : 2021 Article en page(s) : p. 1501-1509 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Blanc (couleur) Encre Mesures optiques Opacité (optique) Réflectance Translucidité (optique) Index. décimale : 667.9 Revêtements et enduits Résumé : Translucency is a critical property of print on flexible packaging. It forms the basis for obtaining full color gamut, hiding the contents of a package and even creating the scanner readable digital codes for point of purchase tracking. The print industry has followed the paint and decorative coatings industry, the paper industry and the plastics industry in attempting to identify measurement methods that will accurately describe translucency or its opposite, opacity. Both of these properties are defined in terms of the contrast ratio, the ratio of the luminous reflectance of a coating placed over a black and a white substrate. In this paper, the theory of diffuse reflectance spectroscopy is used to define the measurements used to determine the contrast ratio. A brief experimental study illustrates the strong points and weak points of traditional contrast ratio measurements. A better model of contrast ratio determination is hypothesized, and an experiment is designed and reported that demonstrates both the validity of the hypothesis and a method for obtaining consistent estimates of the contrast ratio. Note de contenu : - Table 1 : Luminous reflectance (Y) and contrast ratios of the same white ink printed on different substrates and backed with different white and black backings - Table 2 : Contrast ratio readings from three instruments DOI : https://doi.org/10.1007/s11998-021-00515-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00515-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36804 [article]

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A proposed method for evaluation of UV exposure rates in energy curing liquid inks / Marie Hélène Lenedic in PAINTINDIA, Vol. L, N° 9 (09/2000)

[article]  inPAINTINDIA > Vol. L, N° 9 (09/2000) . - p. 81-84 Titre : A proposed method for evaluation of UV exposure rates in energy curing liquid inks Type de document : texte imprimé Auteurs : Marie Hélène Lenedic, Auteur ; Sylvie Rousseau, Auteur ; Laurence Jorissen, Auteur ; Gilbert Marchetti, Auteur ; Jean-Charles Ciza, Auteur ; Maurice Descroix, Auteur ; Danny C. Rich, Auteur Année de publication : 2000 Article en page(s) : p. 81-84 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Encre  Durcissement  'Rayonnement  UV'  'Etude  expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : A method for evaluating the level of UV radiance incident on a UV-cured ink on an operating press has been developed. The method incorporates the Green Detex light sensitive, coated self-adhesive labels. A new method of characterizing the change in the color of the Detex labels results in a characterization which is linear with exposure or press speed and provides the ability to critically adjust speed and exposure for optimum cure of UV inks. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12768 [article]

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A review of solid-state lighting and its impact on the marketing and production of decorative coatings / Danny C. Rich in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 1-9 Titre : A review of solid-state lighting and its impact on the marketing and production of decorative coatings Type de document : texte imprimé Auteurs : Danny C. Rich, Auteur Année de publication : 2016 Article en page(s) : p. 1-9 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eclairage Métamérisme Revêtements décoratifs Index. décimale : 667.9 Revêtements et enduits Résumé : Solid-state lighting in the form of light emitting diode lamps is quickly taking over the world as replacements for existing lower efficiency lamps. The lighting standards, which phased in from 2012 to 2014, do not ban incandescent or any specific lamp type, but they do require that lamps need to use about 25% less energy. The bipartisan Energy Independence and Security Act of 2007 (EISA 2007) established these efficiency standards. Many commercial lamps meet these new standards, including halogen incandescent filament, CFLs, and LEDs. The new bulbs provide a wide range of choices in color and brightness, and many of them last much longer than traditional lamps. However, the spectral distribution of flux from some of these new lamps do not match or even correspond to the spectral power distribution of traditional office and home lighting. In this review, the impact of the new lamp lights on the design, marketing, and production of modern decorative coatings is assessed. The decorative coatings industry has followed recommended guidelines for many decades, producing color-matches that are acceptable under a series of standard illuminants (D65, CWF, A) which are representative of the lamp lights in most common facilities. The new solid-state lamps do not render object colors in ways similar to the currently adopted standardized illuminants. The primary obstacle to the coatings manufacturer is the lack of standards on how to test color-matches for quality conformance under the new lamp lights. As the energy efficient lighting industry is currently still in a technologically developing phase, it appears that it will be some time before any agreements on the characteristics of modern lamp light will be reached. Therefore, guidance is provided on creating and/or using illuminant data representative of these lamps until official reference illuminants are published. Note de contenu : - Lighting in point of sale matching - What the coatings industry can do to adapt to SSL DOI : 10.1007/s11998-015-9704-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9704-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25367 [article]

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