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Precise colour and gloss measurement in one instrument / Henrik Folkerts in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4625 (10/2016)
[article]
Titre : Precise colour and gloss measurement in one instrument Type de document : texte imprimé Auteurs : Henrik Folkerts, Auteur Année de publication : 2016 Article en page(s) : p. 20-22 Langues : Anglais (eng) Catégories : Brillance (optique) -- Mesure
Colorimétrie
Mesure -- InstrumentsIndex. décimale : 667.9 Revêtements et enduits Résumé : How tolerances for both colour and gloss have tightened over the years and illustrates how two into one will go, by combining accuracy, ease of use and functionality changes in appearance.
Material tests are often performed under extreme weather conditions. Paint manufacturers have to perform weathering studies on panels or parts in the desert. In order to objectively determine changes in appearance, colour and gloss need to be measured during the exposure time.
Portable measuring devices allow performing the test outside at the test areas saving a lot of time as the parts don't need to be carried back to the test lab. The spectro-guide gloss gives reliable measurement results according to international specifications. A patented temperature control guarantees highly stable results. Thus, it is no longer necessary to re-calibrate the instrument every eight hours ; the spectro-guide gloss only needs to be re-calibrated every three months - even when the temperature changes. To avoid any user influence the innovative LED technology detects amblent light during the measurement. The data are corrected or a message is displayed to make the user aware of an invalid reading.
Due to an optimised power management and the fact that LEDs only consume a minute amount of energy the spectro-guide gloss uses standard alkaline batteries lasting for up to 8000 readings. This innovative technology also allows using less mechanical components. Therefore, the spectro-guide could be really designed as a portable, light weight and, at the same time, robust instrument. To supply a full description of the appearance of a surface and to precisely analyse the reason for a visuel mismatch, it is necessary to determine bath surface properties: colour and gloss.Note de contenu : - Gloss
- Reflection behaviour of surfaces
- Gloss measurement
- Colour
- Standard illuminant
- Standard observer
- Interaction between light and object
- FIGURES : 1. Components of gloss perception : light source, surface, observer - 2. High gloss and matte to semi-gloss surfaces - 3. Geometries 20° high gloss surfaces, 60° medium gloss surfaces, 85° matte surfaces - 4. Standard illuminant - 6. and 7. Right - 8. BelowEn ligne : https://drive.google.com/file/d/1Gb8Qf61OkRkMfue8IZR9SfFkJebC2wla/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27103
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4625 (10/2016) . - p. 20-22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18398 - Périodique Bibliothèque principale Documentaires Disponible Prediction of the reactive dye recipe in cotton fabric dyeing using the pad-dry-pad-steam process by particle swarm optimisation-least squares support vector machine with matching database / Chengbing Yu in COLORATION TECHNOLOGY, Vol. 138, N° 6 (12/2022)
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Titre : Prediction of the reactive dye recipe in cotton fabric dyeing using the pad-dry-pad-steam process by particle swarm optimisation-least squares support vector machine with matching database Type de document : texte imprimé Auteurs : Chengbing Yu, Auteur ; Wengang Cao, Auteur ; Qingxuan Wang, Auteur ; Zheng Zhe, Auteur ; Qihang Li, Auteur ; Jinyan Ning, Auteur Année de publication : 2022 Article en page(s) : p. 632-639 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases de données
Colorants réactifs
Colorimétrie
CotonLe coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Informatique
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Compared with manual matching, computer colour matching is faster and more reliable. Computer colour-matching results are determined by the method used; however, in practical application, the accuracy of colour matching still needs to be improved. In this paper, we first designed a series of colour-matching schemes with two reactive dyes, Levafix Blue and Levafix Amber, then dyed cotton fabric through the pad-dry-pad-steam process, and finally established the matching database. Furthermore, two colour-matching sub-models were developed by least squares support vector machine (LSSVM) to predict the dye recipe in cotton fabric dyeing, while particle swarm optimisation (PSO) was applied to optimise and tune the parameters of the LSSVM models. Herein, the model inputs are the colour parameters L*, a* and b* of the dyed samples and the model output is dye concentration. It is confirmed that the colour-matching models have excellent evaluation indexes and colour-matching effects. The coefficient of determination is more than 0.99, and the colour-matching precision is more than 98%. All the results prove that the colour-matching models by PSO-LSSVM can be accurately applied in practical dyeing to predict the reactive dye recipe, which is suitable for use on an industrial scale. Note de contenu : - EXPERIMENTAL : Materials - Dyeing using the PDPS process - Colour measurements - Building of the matching database
- RESULTS AND DISCUSSION : Establishment of the colour-matching models - Validation of the colour-matching models - Indices assessment of the colour-matching models - Dyeing reliability assessment of the colour-matching models
- Table 1 : The fitness value and output parameter group of the sub-models
- Table 2 : The evaluation index of the colour-matching models
- Table 3 : Colour parameters of the test samples and the predicted samplesDOI : https://doi.org/10.1111/cote.12622 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12622 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38377
in COLORATION TECHNOLOGY > Vol. 138, N° 6 (12/2022) . - p. 632-639[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23716 - Périodique Bibliothèque principale Documentaires Disponible Prédire la solidité des tissus teints et imprimés / Reynald Convert in L'INDUSTRIE TEXTILE, N° 1352 (06/2003)
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Titre : Prédire la solidité des tissus teints et imprimés Type de document : texte imprimé Auteurs : Reynald Convert, Auteur Année de publication : 2003 Article en page(s) : p. 70-72 Langues : Français (fre) Catégories : Analyse spectrale
Calcul
Colorants réactifs
Colorimétrie
Fibres cellulosiques
Résistance au lavage
Solidité de la couleur
Teinture -- Fibres textiles
Textiles et tissus -- Apprêt
Textiles et tissus imprimésIndex. décimale : 677 Textiles Résumé : En utilisant un logiciel de contretypage classique, auquel sont ajoutées quelques fonctionnalités supplémentaires, il est possible, dans un grand nombre de cas, de calculer, avant teinture et/ou impression, la solidité coloristique du tissu. La méthode, très performante dans le cas du lavage, peut, sous certaines conditions fonctionner également pour d'autres solidités (dégorgement, chlore, etc.). Explications et limites du procédé. Note de contenu : - Cotation d'une solidité: la technique actuelle
- Appréciation visuelle: une source d'erreurs
- De la cotation fiable à la prédiction: mesures spectrocolorimétriques
- Prédiction de solidité au lavage (cas d'un tissu teint aux colorants réactifs)
- Calcul du dégorgement au cours du savonnage de colorants réactifs
- Limite du calcul prédictif des solidités (cas des tissus teints)
- Ce qu'il faut faire pour calculer les soliditésEn ligne : https://drive.google.com/file/d/1YYNHoHhpgdgUFcz3erPRTIiVAP2yh5cJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21065
in L'INDUSTRIE TEXTILE > N° 1352 (06/2003) . - p. 70-72[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001844 - Périodique Bibliothèque principale Documentaires Disponible Preparation and application of a novel cationic fatliquoring agent / Yang Hong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 1 (01-02/2019)
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Titre : Preparation and application of a novel cationic fatliquoring agent Type de document : texte imprimé Auteurs : Yang Hong, Auteur ; Jin Liqiang, Auteur ; Yulu Wang, Auteur ; Jinlong Wang, Auteur Année de publication : 2019 Article en page(s) : p. 35-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle
Caractérisation
Colorants -- Absorption
Colorimétrie
Composés organiques -- Synthèse
Cuirs et peaux -- Propriétés mécaniques
Douceur (toucher)
Emulsifiants
Formulation (Génie chimique)
Produits de nourriture du cuir
Solidité de la couleur
Solutions aqueuses (chimie)
Tension superficielle
TomographieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this work, a novel cationic fatliquoring agent YI-1 was prepared by two steps. Firstly, a cationic emulsifier YW based on fatty acid triethanolamine ester was synthesized by using stearic acid, triethanolamine and benzyl chloride. Then, YH was obtained by mixing a certain amount of YW, non-ionic surfactant and neutral oil. The composition of YH was optimized by its application behaviour as a fatliquor. The structure of YW was characterised by infrared spectroscopy and H-NMR. The surface tension of YW aqueous solution was determined by using a surface tension meter. The stability, particle size and zeta potential of YH were studied. The results show that YH exhibits high centrifugal stability and electrolyte resistance with an average particle size of 24.44nm and zeta potential of 60.8mV at pl-14.5. The leather samples treated by YH show high softness, tensile strength and tear strength. When YH was used as a dye-fixing agent, it could promote the absorption and fixation of anionic dyestuff, and improve the dry/wet fastness of leather and the colour fastness of washing. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation process of cationic fatliquoring agent YH - Characterisation - Application formulations - Determination of leather properties
- RESULTS AND DISCUSSIONS : Synthesis of cationic emulsfifier YW - Surface tension of YW aqueous solution - Optimisation of preparation conditions of YH - Physical and chemical indices of YH - The applications results of YHEn ligne : https://drive.google.com/file/d/18uP_e5DEwIYcUA-K0qEPllcLkGtAFSTp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31791
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 1 (01-02/2019) . - p. 35-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20620 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of styrene-acrylic resin encapsulated C.I. Pigment Yellow 17 and charge control agent multicomponent particles / Yongyue Ding in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)
[article]
Titre : Preparation and characterization of styrene-acrylic resin encapsulated C.I. Pigment Yellow 17 and charge control agent multicomponent particles Type de document : texte imprimé Auteurs : Yongyue Ding, Auteur ; Mingquan Ye, Auteur ; Aijun Han, Auteur ; Yao Zang, Auteur Année de publication : 2018 Article en page(s) : p. 315-324 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Colorimétrie
Copolymère styrène acrylique
Core-Shell
Encapsulation
Jaune
Miniémulsions
Particules (matières)
Pigments
Polymérisation en émulsionIndex. décimale : 667.9 Revêtements et enduits Résumé : Styrene-acrylic resin encapsulated C.I. Pigment Yellow 17 (PY17) and charge control agent (CCA) multicomponent composite particles were prepared by mini-emulsion polymerization. The characterization results of transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and centrifugal sedimentation experiments all verified the encapsulation of PY17 and CCA. The effect of PY17 and CCA dosages on the morphology of multicomponent particles and influence of compound emulsifier dosage on the emulsion stability and the dispersity of latex particles were studied. When the mass fractions of monomers, PY17, CCA, and compound emulsifiers relative to deionized water were 5, 0.4, 0.1, and 0.375%, respectively, the emulsion showed excellent stability; meanwhile, the latex particles had a clear core–shell structure and the best dispersity. The average size of the multicomponent particles changed slightly with the different dosages of PY17, CCA, and compound emulsifiers. Colorimetric analysis of the samples indicated that encapsulation of PY17 may lead to a decrease in yellow value b* but had little effect on its tinctorial strength. Note de contenu : - EXPERIMENTAL : Reagents and materials - Purification of monomers and initiator - Encapsulation of PY17 and CCA with styrene-acrylic resin
- CHARACTERIZATION : Dynamic light scattering (DLS) and zeta potential - Transmission electron microscopy (TEM) - Characterization of emulsion stability to centrifugation, temperature, and electrolyte - Encapsulation efficiency - FTIR spectroscopy - Thermogravimetric analysis (TGA) - Differential scanning calorimetry (DSC) measurement - Color-eye automatic differential colorimeter
- RESULTS AND DISCUSSION : Effect of emulsifiers on the morphology of composite particles - Effect of PY17 and CCA on the morphology of composite particles - Encapsulation efficiency - FTIR spectroscopy analysis - Thermogravimetric analysis (TGA) - Colorimetric analysisDOI : 10.1007/s11998-017-9980-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9980-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30285
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 315-324[article]Réservation
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