Accueil
Catégories
> Colorimétrie
ColorimétrieVoir aussi
|
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
The effect of lighting changes on simultaneous colour contrast : a new aspect of colour rendition / Alessandro Rizzi in COLORATION TECHNOLOGY, Vol. 134, N° 3 (06/2018)
[article]
Titre : The effect of lighting changes on simultaneous colour contrast : a new aspect of colour rendition Type de document : texte imprimé Auteurs : Alessandro Rizzi, Auteur ; Cristian Bonanomi, Auteur ; Laura Blaso, Auteur ; Ornella Li Rosi, Auteur ; Simonetta Fumagalli, Auteur Année de publication : 2018 Article en page(s) : p. 214-221 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
Eclairage
vision des couleursIndex. décimale : 535.6 Couleur Résumé : Among the many metrics used to compute the colour rendition of a light source which have been investigated in recent years, most consider only the spectral power distribution of the light source being tested. To highlight aspects not usually considered in the development of colour rendition metrics, and to propose future directions for alternative approaches consistent with human visual perception, an experiment was conducted to examine colour appearance variations on certain spatial visual content configurations, in other words the effects of illusions under different light sources. Results indicate that stronger simultaneous contrast configurations have a more unpredictable variation in appearance. Therefore, it is proposed that colour spatial distribution should be considered for the future generation of rendering metrics. Note de contenu : - INTRODUCTION : Measuring colour rendering
- EXPERIMENTAL : Materials - Method - ParticipantsDOI : 10.1111/cote.12336 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12336 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30645
in COLORATION TECHNOLOGY > Vol. 134, N° 3 (06/2018) . - p. 214-221[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19954 - Périodique Bibliothèque principale Documentaires Disponible The effect of paper surface-coating pigments and binders on colour gamut and printing parameters / Arif Ozcan in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)
[article]
Titre : The effect of paper surface-coating pigments and binders on colour gamut and printing parameters Type de document : texte imprimé Auteurs : Arif Ozcan, Auteur ; Mustafa Tutak, Auteur Année de publication : 2021 Article en page(s) : p. 445-455 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcool polyvinylique
Argile
CalandrageLe calandrage est une opération qui consiste à faire passer un matériau entre deux cylindres pour le lisser ou le lustrer, ou pour produire un film ou une feuille. Des matériaux de plus faible épaisseur (produits semi-finis, feuilles, plaques, films, crêpes) peuvent être obtenus par calandrage d'un système thermoplastique ou élastomère entre des cylindres éventuellement chauffants.
Une calandreuse comporte au moins deux rouleaux contrarotatifs, dont l'écartement est ajustable. Plusieurs passages entre les cylindres peuvent être réalisés.
Cette opération est par exemple utilisée pour fabriquer des revêtements de sols et de murs, des nappes, de l'ameublement, de la maroquinerie et des articles gonflables.
Pour les pâtes de faible viscosité, une calandreuse peut servir de mélangeur en formulation.
En papeterie, l'opération de calandrage permet d'obtenir différents états de surface de la feuille de papier, notamment pour les papiers couchés. Selon le degré de calandrage (pression, température de chauffe), le papier sera plus ou moins lissé et brillant.
Calcaire
Caoutchouc styrène-butadiène
Colorimétrie
Formulation (Génie chimique)
Impression numérique
Latex
Liants
Papier -- Revêtements
Papier et carton couché
Pigments inorganiques
Revêtements organiques
ZéolitesIndex. décimale : 686.23 Impression Résumé : One of the most important factors affecting the printing quality of printing processes is the surface structure of the printing material. The surface structure of the paper formed by fibres can be modified and smoothed out using coatings that make it more suitable for printing. In this study, three different types of coating pigments were prepared and applied onto an 80 g/m2 base paper surface. Styrene butadiene latex and polyvinyl alcohol were used as binders, and three different types of pigments, precipitated calcium carbonate, clay and zeolite, were used as pigments in the prepared coatings. The physical and optical properties of all calendered and non-calendered papers were measured and compared. All the prints were produced with an ink-jet digital printing machine upon the coated and calendered papers for recording the printability parameters. The ΔE00 differences between colours, tone values, colour gamuts and colour gamut volumes were measured from the surfaces of the printed papers. The results showed that the coating type had a better effect on print quality, and that the printability properties of coated papers and even calendered papers were very good. Note de contenu : - Table 1 : Physical and optical properties of base paper
- Table 2 : Coating formulation
- Table 3 : Physical and optical properties of coated and calendered papers with precipitated calcium carbonate (PCC)
- Table 4 : Physical and optical properties of coated and calendered papers with clay
- Table 5 : Physical and optical properties of coated and calendered papers with zeolite
- Table 6 : Comparison of the ΔE00 colour difference values for base paper and coated papers according to ISO 12647-2, paper type 4
- Table 7 : Colour gamut volumes obtained using ColorThink Pro v.3DOI : https://doi.org/10.1111/cote.12540 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12540 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36488
in COLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 445-455[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22951 - Périodique Bibliothèque principale Documentaires Disponible The effect of ultraviolet-curable water-borne polyurethane acrylate binder concentration on the printing performance of synthetic leather / Gülçin Baysal in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)
[article]
Titre : The effect of ultraviolet-curable water-borne polyurethane acrylate binder concentration on the printing performance of synthetic leather Type de document : texte imprimé Auteurs : Gülçin Baysal, Auteur ; Berdan Kalav, Auteur ; Burcak Karaguzel Kayaoglu, Auteur Année de publication : 2019 Article en page(s) : p. 111-120 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
Copolymère uréthane acrylate
Cuir synthétique imprimé
Dureté (matériaux)
Formulation (Génie chimique)
Haut extrait sec
Liants
Photoréticulation
Polymères en émulsion
Rayonnement ultraviolet
Résistance à l'abrasion
Résistance au chocs
Revêtements en phase aqueuse
Sérigraphie
Solidité de la couleurIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, synthetic leather samples were screen printed with pigmented pastes including two types of photoinitiators and three different concentrations of ultraviolet (UV)-curable water-borne polyurethane acrylate binder. The curing process was conducted under different combinations of lamps (gallium, mercury, gallium/mercury and gallium/gallium/mercury) at three power levels. Abrasion resistance, crock fastness, hardness and colour strength were investigated. Chemical changes in the clear and pigmented film structures because of UV curing were analysed by Fourier Transform-infrared spectroscopy measurements. In hardness measurements, the highest hardness values were obtained with clear and pigmented formulations which have the highest solid content (57%). In colour measurements, higher K/S values were obtained in samples printed with the formulation having a binder concentration of 46%. Wet crock fastness values improved as the energy level increased during curing, and the highest values were obtained with a formulation which had a binder concentration of 57%. Greater amounts of binder in the formulations and increased amounts of energy applied to the surface during curing increased the hardness value of the prints, thus better abrasion resistance was obtained. Overall results suggested that the highest hardness, crock fastness and abrasion resistance values were obtained with the formulation with a binder concentration of 57%. However, for ease of application, printing efficiency and colour strength, the formulation with a binder concentration of 46% is recommended for printing, and curing under consecutive passes with gallium and mercury lamps at 120 W/cm is proposed in terms of energy efficiency and printing performance. Note de contenu : - EXPERIMENTAL : Materials - Methods
- RESULTS AND DISCUSSION : UV curing and pendulum hardness measurements
- Fourier transform infrared (FTIR) spectroscopy - Colour measurements - Crock fastness of printed synthetic leather samples - Martindale abrasion resistance measurements of printed synthetic samplesDOI : 10.1111/cote.12382 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12382 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32324
in COLORATION TECHNOLOGY > Vol. 135, N° 2 (04/2019) . - p. 111-120[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20869 - Périodique Bibliothèque principale Documentaires Disponible The effect of zinc oxide nanoparticles on the weathering performance of wood-plastic composites / Sefa Durmaz in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
[article]
Titre : The effect of zinc oxide nanoparticles on the weathering performance of wood-plastic composites Type de document : texte imprimé Auteurs : Sefa Durmaz, Auteur ; Ozlem Ozgenc Keles, Auteur ; Ugur Aras, Auteur ; Yusuf Ziya Erdil, Auteur ; Fatih Mengeloglu, Auteur Année de publication : 2023 Article en page(s) : 430-440 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbeurs de rayonnement ultraviolet
Analyse spectrale
Colorimétrie
Composites à fibres -- Additifs
Composites à fibres -- Détérioration
Composites à fibres végétales
Composites à fibres végétales -- Propriétés mécaniques
Composites à matrice organique
Essais accélérés (technologie)
Microscopie
Nanoparticules
Oxyde de zinc
Réflexion totale atténuée
Résistance au rayonnement ultraviolet
Solidité de la couleur
StatistiqueIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In recent years, wood-plastic composites (WPCs) have become among the most popular engineering materials. Most of their usage areas are outdoors, where they encounter various damaging factors. The weathering conditions cause significant deterioration to WPC surfaces, which negatively influences their service life. In this study, zinc oxide nanoparticles at different concentrations (1%, 3%, 5%, 10%) were added to a high-density polyethylene-based WPC matrix. The effect of zinc oxide nanoparticles on the weathering performance of WPC was evaluated after 840 hours of an artificial weathering test. The highest colour changes (∆E*) were monitored with control samples exposed for 840 hours. Adding zinc oxide nanoparticles improved the ultraviolet (UV) resistance and decreased the colour changes. The wood flour content also affected the colour changes on the WPC surface. A combination of 10% zinc oxide nanoparticles and 50% wood flour content provided the lowest colour changes. The barrier effect of nanoparticles protected the WPC surfaces from UV light. Zinc oxide nanoparticles also positively affected the load transfer, which restricted the reduction in mechanical properties after the weathering test. The degradation on the surface of WPCs was also investigated using attenuated total reflectance-Fourier Transform–infrared analysis. The changes in the characteristic bands of polymer and wood indicated that surface degradation was inevitable. Light and scanning electron microscopy images also demonstrated micro-cracks and roughness on the surface of WPCs. It is concluded that UV degradation is unavoidable, but zinc oxide nanoparticles can improve surface resistance against weathering conditions. Note de contenu : - EXPERIMENTAL : Materials - WPC production - Accelerated UV weathering test - Colour measurement - ATR-FTIR spectroscopy analysis - Mechanical properties - Microscopic analysis - Statistical analysis
- RESULTS AND DISCUSSION : Mechanical properties - Colour changes - ATR-FTIR spectroscopy analysis - Light microscopy analysis - Scanning electron microscopy analysis
- Table 1 : The wood flour, polymer and nanoparticle content
- Table 2 : The mechanical properties of WPCsDOI : https://doi.org/10.1111/cote.12666 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12666 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39680
in COLORATION TECHNOLOGY > Vol. 139, N° 4 (08/2023) . - 430-440[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24152 - Périodique Bibliothèque principale Documentaires Disponible The evaluation of printability and non-enzymatic NADH reduction of 4'-chlorophenylazo-2-naphthol for use as a printing pigment / M. Oktav in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B3 (09/2005)
[article]
Titre : The evaluation of printability and non-enzymatic NADH reduction of 4'-chlorophenylazo-2-naphthol for use as a printing pigment Type de document : texte imprimé Auteurs : M. Oktav, Auteur ; M. Ulgen, Auteur Année de publication : 2005 Article en page(s) : p. 185-188 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chromatographie en phase liquide à hautes performances
Colorants azoïques
Colorimétrie
Dispersions et suspensions
Encre d'imprimerie
Formulation (Génie chimique)
Papier et carton couché
Pigments
Réduction (chimie)
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : The printability of 4'-chlorophenylazo-2-naphthol (CPAN) was evaluated on gloss-coated paper. The preliminary results indicated that the proposed pigment could be used in offset and oil-based ink production. The pigment and its potential reduction product, 4-chloroaniline, were then separated by a reverse phase high-pressure liquid chromatography system. The pigment was incubated with NADH at 37°C for half an hour at different pH values to investigate its possible reduction into the corresponding primary amines (ie 4-chloroaniline and 2-amino-1-naphthol). However, no reduction was observed. This finding indicates a desirable evidence for the pigment in terms of its stability against NADH (nicotinamide adenine dinucleotide), a known biochemical reducing agent in living organisms when the potential toxicity from aromatic primary amines is considered. Note de contenu : - Preparation of 4'-chlorophenylazo-2-naphthol (CPAN)
- Preparation of the ink dispersions and the printing experiment
- High-performance liquid chromatography liquid chromatography and reaction of CPAN with NADH
- Table 1 : Printing ink formulation
- Table 2 : Varnish composition
- Table 3 : Some colour properties of CPAN on gloss-coated paperDOI : 10.1007/BF02699571 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699571.pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5414
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 88, B3 (09/2005) . - p. 185-188[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 003027 - Périodique Bibliothèque principale Documentaires Disponible The impact of lowering the Cr(VI) detection limit in leather : implications on quantitative analysis / S. J. Davis in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 4 (07-08/2022)
PermalinkThe impact of viewing conditions on observer variability for cross-media colour reproduction / Yoon Ji Cho in COLORATION TECHNOLOGY, Vol. 135, N° 3 (06/2019)
PermalinkThe measurement of colour / W. D. Wright / Londres [Royaume-Uni] : Adam Hilger LTD
PermalinkThe measurement of colour / W. D. Wright / Londres [Royaume-Uni] : Hilger & watt Ltd (1958)
PermalinkThe minimum number of measurements for colour, sparkle, and graininess characterisation in gonio-apparent panels / Elisabet Chorro in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)
PermalinkThe National Coil Coating Association’s Color Experiment : Potential for converting to CIE color space and deltaE 2000 / David A. Cocuzzi in COATINGS TECH, Vol. 16, N° 1 (01/2019)
PermalinkThe role of instrumental testing in the 90s / A. W. Landmann in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 74 (Année 1990)
PermalinkThe study of colour fastness of commercial microencapsulated photoresponsive dye applied on cotton, cotton/polyester and polyester fabric using a pad-dry-cure process / Mateja Kert in COLORATION TECHNOLOGY, Vol. 133, N° 6 (12/2017)
PermalinkThe three pot solution for chromium, tannins and solid waste : Recovery and reuse technique for spent semi-chrome liquor and chrome shavings / Subramanian Saravanabhavan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 5 (09-10/2004)
PermalinkThermal management and intensive orange / Robert Schädel in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 5 (2022)
PermalinkThermal sensitive agents for making stimuli responsive leathers / Jaya Prakash Alla in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 12 (12/2020)
PermalinkTôles prélaquées - Méthodes d'essai. Partie 3 : Différence de couleur - Comparaison au moyen d'instruments - Norme EN 13523-3 / Comité Européen de Normalisation / Bruxelles : Comité Européen de Normalisation (2009)
PermalinkTone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing / Sathya Ramalingam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
PermalinkPermalinkTransmission reconstruction of transparent solutions using particle swarm optimisation / Elham Farazandemehr in COLORATION TECHNOLOGY, Vol. 138, N° 2 (04/2022)
Permalink