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Repeatability and reproducibility of specular gloss meters in theory and practice / Frédéric Bernard Leloup in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
[article]
Titre : Repeatability and reproducibility of specular gloss meters in theory and practice Type de document : texte imprimé Auteurs : Frédéric Bernard Leloup, Auteur ; Jan Audenaert, Auteur ; Gaël Obein, Auteur ; Guillaume Ged, Auteur ; Peter Hanselaer, Auteur Année de publication : 2016 Article en page(s) : p. 941-951 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique) -- Mesure
Réflectance
Simulation, Méthode deTags : 'Glossaire spéculaire' 'Compteur de brillance' 'Accord inter instrument' Index. décimale : 667.9 Revêtements et enduits Résumé : In order to numerically quantify and to ensure consistency of the visual appearance of the end product, many industries perform color and gloss measurements, through the results of which they define maximum tolerances during quality control. For this, they may primarily rely on precision data for repeatability and reproducibility as reported by instrument manufacturers, who develop their instruments according to standardized measurement geometries defined in international standards. This paper reports on an investigation of the inter-instrument agreement between specular gloss meters which conform to universally adopted gloss standards. Six commercially available instruments, manufactured by three different companies, and twenty-five gloss artifacts, with specular gloss values ranging between 2 and 110 gloss units (60° geometry), were selected for use in the study. The repeatability and reproducibility of the instruments were assessed according to the criteria described in ASTM D523-14 and ISO 2813:2014, and to the specifications reported by the instrument manufacturers. Ray tracing simulations were performed by use of the bidirectional reflectance distribution function measurement data of two samples, and based on the standardized optical design of the specular gloss meter, in order to get a better insight on the expected tolerances of the gloss readings from a theoretical point of view. On average, the practical results indicate that both the repeatability and reproducibility values are higher than those specified in the recommendations and by the manufacturers. Ray tracing simulations confirm this finding. While specified repeatability and reproducibility thresholds are based on ideal standards, in practice, there are parameters that can lead to significant higher deviations. Care should therefore be taken when analyzing measurement results obtained from different instruments, and when defining tolerances for evaluation of gloss measurements. Note de contenu : - PRACTICAL APPROACH : Devices under test - Test samples - Practical results
- THEORETICAL APPROACH : Ray tracing simulations - Bidirectional reflectance distribution function of two test samples - Simulation resultsDOI : 10.1007/s11998-016-9813-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9813-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27241
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 6 (11/2016) . - p. 941-951[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18514 - Périodique Bibliothèque principale Documentaires Disponible Silicones and naturals : a perfect combination / Janet L. Duffy in PERSONAL CARE EUROPE, Vol. 11, N° 5 (11/2017)
[article]
Titre : Silicones and naturals : a perfect combination Type de document : texte imprimé Auteurs : Janet L. Duffy, Auteur ; Karla A. Macian, Auteur ; R. U. Rojas Wahl, Auteur ; Echo Tan, Auteur Année de publication : 2017 Article en page(s) : p. 51-54 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle
Angle de contact
Brillance (optique) -- Mesure
Cosmétiques -- Analyse
Ingrédients cosmétiques
Silicones -- Emploi en cosmétologieIndex. décimale : 668.5 Parfums et cosmétiques Résumé : The goal of this work was to give an impression of how some leading silicone technologies may help enhance the sensory and aesthetics of naturals used in personal care products. We conducted measurements related to the issue of reducing tack, oiliness and spreadability. In general, subject to the exceptions described above, silicones tended to effectively reduce the tack and oiliness and enhance spreadability. Comparisons were made between in vitro physical measurements and an in vivo expert sensory panel. Silicones often can be very useful sensory and performance enhancers in personal care products. Future work will include the design and testing of full personal formulations highlighting those benefits further. Note de contenu : - Fig. 1. Overview of the Normal Force (FN) measurements
- Fig. 2. Normal force measurements - a closer look at the low FN results
- Fig. 3. Shines measurements
- Fig. 4. Contact angle measurements
- Fig. 5. Sensory panelEn ligne : https://drive.google.com/file/d/1eTqD_z7f_L7FqSTymrJ9vbqEK5nn-a5D/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29380
in PERSONAL CARE EUROPE > Vol. 11, N° 5 (11/2017) . - p. 51-54[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19976 - Périodique Bibliothèque principale Documentaires Disponible 19345 - Périodique Bibliothèque principale Documentaires Disponible Studies on the correlation between surface and sewability properties of crust leather / C. Niklesh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 5 (05/2023)
[article]
Titre : Studies on the correlation between surface and sewability properties of crust leather Type de document : texte imprimé Auteurs : C. Niklesh, Auteur ; Gladstone Christopher Jayakumar, Auteur ; Phebe Aaron, Auteur Année de publication : 2023 Article en page(s) : p. 175-182 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Allongement (mécanique)
Angle de contact
Brillance (optique) -- Mesure
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuir -- Couture
Eclatement (matériaux)
Essais de résilience
Hydrophilie
Post-tannage
Traction (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The surface properties of leather are critical factors that influence the aesthetic quality of the leather. Commonly, organoleptic properties are evaluated for leathers to ascertain the bulk properties such as compactness, smoothness, softness and general grain appearance. Though these parameters are very subjective, still these properties are essential for leather product manufacture. In the current research, we discuss the correlation between the surface parameters and sewability of the leathers. In our earlier studies, we discussed the influence of syntans and fatliquors on sewability. In aligning to a similar subject, the impact of surface properties has been evaluated through contact angle measurements and correlated with the sewability properties of the leather. From the spread ability measurements, it can be inferred that the sewability properties are better towards the surface of the leather, which is more hydrophilic. This result agrees that the fatliquoringof leathers has enhanced the stitch ability; moreover, the studies provide biophysical parameter importance for qualifying leather sewability. Note de contenu : - MATERIALS AND METHODS : Contact angle analysis - Gloss meter analysis - Sewability analysis - Physical testing of the sample - Optical microscopic studies
- RESULTS AND DISCUSSION : Contact angle evaluation - Significance of hydrophibicity - Hydrophilicity on sewability property - Gloss meter evaluation - Microscopic evaluation
- Table 1 : Post tanning process
- Table 2 : Sewability measurements
- Table 3 : Lastometer ball burst test - Grain crack
- Table 4 : Tensile strength and elongation measurementsDOI : https://doi.org/10.34314/jalca.v118i5.7358 En ligne : https://drive.google.com/file/d/1pIfoadkYHNsVBshv19m5lRJbY9AhD1kX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39302
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 5 (05/2023) . - p. 175-182[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23954 - Périodique Bibliothèque principale Documentaires Disponible Sustainable, low-emissions, high-performance polyols for wood floor coatings / Gary Spilman in COATINGS TECH, Vol. 15, N° 10 (10/2018)
[article]
Titre : Sustainable, low-emissions, high-performance polyols for wood floor coatings Type de document : texte imprimé Auteurs : Gary Spilman, Auteur ; Scott Moore, Auteur ; Simone J. Marshall, Auteur Année de publication : 2018 Article en page(s) : p. 34-43 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Bois -- Vernis
Brillance (optique) -- Mesure
Dureté (matériaux)
Formulation (Génie chimique)
Isocyanates
Polyols
Polyuréthanes
Résistance à l'abrasion
Résistance aux taches
Résistance chimique
Vernis -- Additifs
Vernis bi-composantIndex. décimale : 667.9 Revêtements et enduits Résumé : The industrial wood coatings space is undergoing some challenges and changes while continuing to grow. The development of sustainable, low-emissions, high-performance wood floor coating technologies continues to be of high interest to the coatings industry. Sustainable content in these coatings contributes to an improved environmental footprint, while low-emission compositions improve the indoor air quality and thereby the health and well-being of building and home occupants desiring to re-occupy these structures as soon as possible. Biorenewablecontent polyols that incorporate low volatile organic content (VOC) (<150 g/L) technology to yield two-component (2K) polyurethane wood floor coatings that have excellent stain and chemical resistance, excellent adhesion to both bare and prefinished floors, good abrasion resistance, low odor, and excellent gloss have been developed. The new coating properties may be readily tailored to meet the individual needs of different floor coating jobs by simply adjusting the isocyanate index or isocyanate type. This study compared a new fully formulated, 150 g/L coating based on this sustainable resin technology and demonstrated properties consistent with being the best overall protective coating for wood at the most economical usage (matching or better finish is achieved with only two coats vs the commercial products needing four or five coats over both original and refinished wood flooring) and lowest VOC in the test group. Initial performance from converting the new floor-coating products into waterborne systems was also investigated. Note de contenu : - Table 1 : Isocyanate materials used
- Table 2 : Formulation additives
- Table 3 : Adhesion data
- Table 4 : Chemical resistance (MFMA specification)
- Table 5 : Hardness data
- Table 6 : Isocyanate blending results
- Table 7 : Catalyst ladder at two index levels for IPDI trimer
- Table 8 : Final 2K coating formulation taber test data
- Table 9 : Benchmark samples
- Table 10 : Final film properties of RMG 2K SB formulated 150 g/L coating vs MFMA specification
- Fig. 1 : König hardness results of commercial vs developmental samples
- Fig. 2 : a) Pencil hardness and b) adhesion results of commercial vs developmental samples
- Fig. 3 : Taber abrasion results at 100 and 500 cycles, grams weight loss
- Fig. 4 : Impact results
- Fig. 5 : Gloss reading readings for various products tested ve RMG 2K SB
- Fig. 6 : Gloss and distinctness of image from the developmental 2K solventborne coating over scuffed UV-cured OEM floor finish on maple
- Appendix : Final wood coating formulation for 75% we solids at 150 g/L VOCEn ligne : https://drive.google.com/file/d/1X210OPR2aKp7V5EM5u7S47PvbF1lJjQB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31828
in COATINGS TECH > Vol. 15, N° 10 (10/2018) . - p. 34-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20636 - Périodique Bibliothèque principale Documentaires Disponible The effects of color concentrates on the rheology of tint bases / Douglas J. Herrick in COATINGS TECH, Vol. 10, N° 9 (09/2013)
[article]
Titre : The effects of color concentrates on the rheology of tint bases Type de document : texte imprimé Auteurs : Douglas J. Herrick, Auteur ; Jason W. Boke, Auteur ; Maung Y. Htet, Auteur ; Raymond H. Fernando, Auteur Année de publication : 2013 Article en page(s) : p. 34-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bases à teinter
Brillance (optique) -- Mesure
Colorants dispersésCatégorie de colorants très peu solubles dans l'eau, utilisés à l'origine comme colorants pour l'acétate, et qui généralement sont appliqués sous forme de suspensions aqueuses de faible concentration.Les colorants dispersés sont largement utilisés dans la teinture de la plupart des fibres manufacturées, surtout le polyester.
Epaississants
Formulation (Génie chimique)
hydroxyéthylcellulose
Polyuréthane éthoxylé modifié de façon hydrophobe
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Rheological properties of coatings formulated with associative thickeners are quite sensitive to a number of formulation variables. Small changes in these variables, which include the latex, thickener, and surfactant components of the coating, can have a profound effect. Many previous studies have focused on understanding and controlling these sensitivities. However, few studies have focused on the relatively large viscosity drop and related problems when predispersed colorants are added to tint bases formulated with associative thickeners. In this study, pastel and deep-tone tint bases were formulated with associative and nonassociative thickeners. The tint bases were then tinted with six different conventional colorant dispersions and six low-VOC counterparts of the same colorants. Effects of the colorants, thickeners, and VOCs on viscosity profiles, dynamic viscoelastic properties, color development, and gloss were determined and results are presented. Note de contenu : - EXPERIMENTAL MATERIALS AND METHODS : Pastel Base Formulations - Deep-tone base formulations - Colorant addition - Rheology characterization - Gloss and tint strength measurements
- RESULTS AND DISCUSSION : Viscosity behavior of tint bases without colorants - Effect of colorants on viscosity Behavior of tint bases - Effect of colorants on dynamic viscoelasic properties of tint bases - Effect of colorants on other properties of tint bases
- Table 1 : Pastel base with HEC thickeners
- Table 2 : Pastel base with HEUR thickeners
- Table 3 : Deep-tone base with HEC thickeners
- Table 4 : Deep-tone base with HEUR thickeners
- Table 5 : List of colorants and corresponding CI pigments used in this study
- Table 6 : Stormer viscosities and solids (% by weight) in tint basesEn ligne : https://drive.google.com/file/d/16Xjmr55HkbpVrB4jwI8fSItJvNv5fdE3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40549
in COATINGS TECH > Vol. 10, N° 9 (09/2013) . - p. 34-40[article]The use of engineered silica to enhance coatings / Jim Reader in COATINGS TECH, Vol. 17, N° 6 (06/2020)
PermalinkTôles prélaquées - Méthodes d'essai. Partie 2 : Brillant - Norme EN 13523-2 / Comité Européen de Normalisation / Bruxelles : Comité Européen de Normalisation (2014)
PermalinkVideo-based paired comparison to evaluate some cosmetic products under camera movement for dynamic performance / Emilie Yokoyama in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 4 (08/2023)
PermalinkWhy accurate colour matching needs to control for gloss / Jason Loehr in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4655 (10/2019)
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