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Sensory and instrumental research of leather softness / Ewa Marcinkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 2 (03-04/2020)
[article]
Titre : Sensory and instrumental research of leather softness Type de document : texte imprimé Auteurs : Ewa Marcinkowska, Auteur ; Gabriela Zielinska, Auteur Année de publication : 2020 Article en page(s) : p. 105-109 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle
Cuir
Douceur (toucher)
Mesure -- Instruments
Statistique
Surfaces -- AnalyseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A statistical analysis of the results of leather softness testing has indicated that there is a correlation between sensory evaluation scores and results of objective instrumental measurement. The tests were carried out by using 7 leather specimens, of which one was aldehyde-based syntan treated, while others were chrome tanned, and all the leathers were grain finished. Sensory evaluation of leather softness was performed by using the ranking method and the multiple ordering method with the participation of 70 panelists (judges). Based on calculated value of Kendall's W a moderate agreement among rates was found. Instrumental softness measurements on the same specimens were carried out according to a standardised leather softness assessment method with a softness tester. The value of the Spearman's rank correlation coefficient equal to 0.893 indicates a strong positive correlation between the results of the score assessment and instrumental measurements. A slightly weaker correlation, but still considered strong, equal to 0.821 was found between the results of the multiple ordering method and instrumental measurements. Note de contenu : - Sensory evaluation of leather softness
- Instrumental measurements of leather softness
- Table 1 : Test material characteristics
- Table 2 : Sensory evaluatio of leather softness by using the ranking method
- Table 3 : Sensory evaluation lf leather softness by using the multiple ordering method
- Table 4 : Results of statistical analysis of concordance between indications of sensory leather softness evaluation
- Table 5 : Results of leather softness measurements by using the instrumental method (PN-EN ISO 17235:2015)En ligne : https://drive.google.com/file/d/124DRtsSBcw0KXb2uVA7aPEIlmDYSgVk1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33916
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 2 (03-04/2020) . - p. 105-109[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21654 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Shades of difference : Visual and instrumental methods of colour assessment analysed Type de document : texte imprimé Auteurs : Werner Rudolf Cramer, Auteur Année de publication : 2018 Article en page(s) : p. 34-39 Langues : Anglais (eng) Catégories : Colorimétrie
Evaluation visuelle
Mesure -- Instruments
vision des couleursIndex. décimale : 667.9 Revêtements et enduits Résumé : Methods of assessing colour and colour differences visually and instrumentally are discussed and compared. Preferred methods of carrying out visual colour assessment are described and explanations are offered for why visual and instrumental assessments may sometimes seem to give conflicting results. Note de contenu : - Measurement angles and correlation problems
- An organised approach to visual matching
- The principle of reversibility - and some exceptions
- Instrumental assessment : geometrical considerations
- Angle-dependent behaviour of effect pigments
- Appearance of metallic and effect pigments compared
- Visual and instrumental aspects summarised
- Fig. 1 In this example of visual observation, the starting position at the window is + 15° for illumination and -15° for observation, i.e. the difference angle between illumination and observation is 30°C
- Fig. 2. Tilting the panel up, the angle of illumination increases and the aspecular (difference angle between observation and gloss) also increases
- Fig. 3. The observation angle increases when tilting the panel down. In the first steps the aspecular angle is negative, i.e. the observation angle is opposite to the gloss angle
- Fig. 4. Tilting the panel further down, the aspecular angle increases. The difference angle between illumination and observation remains the same
- Fig. 5. Tilting a panel up and down at a window produces the same colour travel
Fig. 6. When tilting a panel by the window, the highest lightness is observed near the gloss and will decrease when the panel is tilted away from this. The same or similar values occur due to principle of the reversibility of light ; deviations reveal the orientation of the effect pigments
- Fig. 7. A portable instrument illuminates at 45°. Measurement is made at -15°, +15°, 25°, 45°, 75° and 10° off gloss
- Fig. 8. If coloured transparent interference pigments are applied to a white background, the colour change from the reflection to the transmission colour is shown when measuring the gloss line. The transition range is between 20° and 30° from the gloss angle
- 9. Application also influences behaviour with regard to lightness. The same coating was applied with and without an additional effect layer. Close to the gloss, the effect layer produces a brighter shade
- 10. Tilting a sample panel at the window or in a light cabin shows the same colour gradient for both tilting down and tilting up. The colour gradient that current portable devices describe corresponds to the gradient when the gloss angle is changed. In all cases, different colour gradients arise from those of the interferenceEn ligne : https://drive.google.com/file/d/1TQwGB5nfx6DUSG2me8WmaEWhw62SxsnE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30494
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2018) . - p. 34-39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19837 - Périodique Bibliothèque principale Documentaires Disponible Simpler solution complex coating came / Peter Ho in PROTECTIVE COATINGS EUROPE (PCE), Vol. 5, N° 2 (04-05-06/2013)
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Titre : Simpler solution complex coating came Type de document : texte imprimé Auteurs : Peter Ho, Auteur Année de publication : 2013 Article en page(s) : p. 29-31 Langues : Anglais (eng) Catégories : Analyse des données
Couches minces
Epaisseur -- Mesure
Logiciels
Mesure -- Instruments
Qualité -- Contrôle
Revêtements -- Analyse:Peinture -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : Much has been written about the increase in coating thickness measurement requirements. The amount of required measurements is increasing dramatically and the administrative burden associated with evaluating the data has the potential to be overwhelming. Here we look at how technological advances allow for a much more streamlined approach to the reporting of inspections. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18799
in PROTECTIVE COATINGS EUROPE (PCE) > Vol. 5, N° 2 (04-05-06/2013) . - p. 29-31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15088 - Périodique Bibliothèque principale Documentaires Disponible Special K 2013 in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 9 (09/2013)
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Titre : Special K 2013 Type de document : texte imprimé Année de publication : 2013 Article en page(s) : p. 15-71 Langues : Anglais (eng) Catégories : Compoundage
Matières plastiques -- Additifs
Matières plastiques -- Appareils et matériel
Matières plastiques -- Extrusion
Matières plastiques -- Industrie et commerce
Matières plastiques -- Moulage par injection
Matières plastiques -- Thermoformage
Mesure -- Instruments
Salons professionnelsIndex. décimale : 668.4 Plastiques, vinyles Note de contenu : - INJECTION MOLDING : Process technology : Injection molding 2.0 - Injection molding machines : Tuned for efficiency
- MATERIAL HANDLING : Material supply : Convenient but more precise and efficient
- EXTRUSION : Pipe and profile extrusion : Further development of every detail - Film extrusion : Efficiency, quality and new fields for application
- EXTRUSION LINES AND COMPONENTS : Process optimization : From machine element to concept study
- COMPOUNDING : Compounding and recycling : Extending the boundaries
- PU MASCHINES : PU technology : Increasingly customized
- THERMOFORMING/PRESSURE FORMING : Intelligent control improves process stability
- JOINING TECHNOLOGY : Joining : License to join
- MEASUREMENT AND TESTING : Quality control : Increased pressure for testing provides a spur
- ENGINEERING PLASTICS : High performance and reliability
- ADDITIVES : Additives and compounds : Focus on specific solutionsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22885
in KUNSTSTOFFE INTERNATIONAL > Vol. 103, N° 9 (09/2013) . - p. 15-71[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15505 - Périodique Bibliothèque principale Documentaires Disponible Strain measurements and damage detection by fibre optics sensors in large structures / Julian Sierra-Peres in JEC COMPOSITES MAGAZINE, N° 96 (04/2015)
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Titre : Strain measurements and damage detection by fibre optics sensors in large structures Type de document : texte imprimé Auteurs : Julian Sierra-Peres, Auteur Année de publication : 2015 Article en page(s) : p. 52-55 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Capteurs (technologie)
Contraintes (mécanique)
Déformations (mécanique)
Détection de dommages (matériaux)
Fibres optiques
Mesure -- Instruments
PrototypesIndex. décimale : 668.4 Plastiques, vinyles Résumé : By means of a nover and robust automated technique based on strain field pattern recognition, a defect detectability study was performed for two 13.5-metre-long wind turbine blade prototypes under different load scenarios. Fibre optic sensors (FOS) were embedded into the blades (fully made of composite materials) during the manufacturing process, which consisted in an experimental RTM light procedure. Two different FOS technologies were used: fibre Bragg gratings (FBGs) and distributed sensing by means of an optical backscatter reflectometer (OBR). Some challenges associated with the integration of the sensor within the structure had to be faced in order to guarantee the appropriate operation of the sensors network during the service life of the blades (in this case, during the experiments). Several static tests were conducted, including a test campaign in a wind turbine test laboratory with known artificial damages induced into the structure, and the sensitivity of the technique was evaluated. The results showed that each damage could be detected using both sensing techniques. Note de contenu : - Need for health monitoring
- Strain measurement methodology
- Prototype manufacturingPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23884
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Code-barres Cote Support Localisation Section Disponibilité 17167 - Périodique Bibliothèque principale Documentaires Disponible Structural and functional age-related changes in some facial signs of Chinese men: A pilot study / Chengda Ye in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 44, N° 5 (10/2022)
PermalinkSwelling stresses and strains associated with mass transport in polymeric films / Jou Chon-Shin in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 67, N° 845 (06/1995)
PermalinkThe injection molding machine as measuring instrument / Thomas Löhl in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 4 (04/2016)
PermalinkTired of waiting for paint to dry ? in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4632 (06/2017)
PermalinkValidation of an in-mold multivariate sensor for measurement of melt temperature, pressure, velocity, and viscosity / Gordon Guthrie in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 4 (08/2017)
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