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Auteur Mohammad Amani Tehran |
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Colour dependency of textile samples on the surface texture / Saeideh Gorji Kandi in COLORATION TECHNOLOGY, Vol. 124, N° 6 (2008)
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Titre : Colour dependency of textile samples on the surface texture Type de document : texte imprimé Auteurs : Saeideh Gorji Kandi, Auteur ; Mohammad Rahmati, Auteur ; Mohammad Amani Tehran, Auteur Année de publication : 2009 Article en page(s) : p.348-354 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this paper, the perceptual and instrumental effects of texture on colour is investigated, using 63 textile samples, in nine colour centres and seven texture structures. The effectiveness of texture is evaluated by assessing colour differences between six texture samples and a standard texture in each colour group. Experimental results show that the sample texture has a significant effect on the measured and perceived colour and its influence depends on the colour centre of the sample. The magnitude of texture effect is more dependent on the texture type than on its coarseness. A new term to evaluate texture difference of a pair of textile samples was defined using a Gabor filter (Gabor texture difference). The visual colour changes gave a good correlation with Gabor texture difference values; however, the colour of the samples affected this correlation. So the colour change, as a result of texture differences, depends on two independent variables consisting of the Gabor texture difference and the colour centre of samples. DOI : 10.1111/j.1478-4408.2008.00162.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00162.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3243
in COLORATION TECHNOLOGY > Vol. 124, N° 6 (2008) . - p.348-354[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010992 - Périodique Bibliothèque principale Documentaires Disponible Improvement of leather flame retardancy through nano clay addition / Samaneh Sepehri in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 11 (11/2020)
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Titre : Improvement of leather flame retardancy through nano clay addition Type de document : texte imprimé Auteurs : Samaneh Sepehri, Auteur ; Mohammad Amani Tehran, Auteur ; Fatemeh Zeighami, Auteur Année de publication : 2020 Article en page(s) : p. 418-427 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile
Cuir
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
Cuirs et peaux de chèvres
Essais dynamiques
Nanoparticules
Résistance à la traction
Stabilité thermique
Tannage
Thermogravimétrie
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather is widely used in various industries including apparel, safety clothing, aircraft and automotive, due to its unique properties such as softness, air permeability, chemical resistance, high flexibility and reasonable mechanical resistance. Since leather products usually contain flammable organic compounds such as tanning, fatliquoring, dyeing and finishing materials, improvement of its flame retardancy is very important. A lot of flame retardants have been synthesized and applied to improve flame retardancy of leather. One of the best materials is nanoclay because it is easily available, environment-friendly and has a low cost. In this research, we propose a process that reduces the burning length of the leather and increases its thermal stability. For this purpose, clay nanoparticles by 1, 3, and 5 mass percent (relative to wet leather mass) were added to wet-blue bovine and goat leather under certain (temperature and time) conditions during the re-tanning process. The results of the TGA test on bovine leather samples showed that by increasing the amount of nanoclay, the thermal stability of samples was increased. SEM images prepared from the grain and cross-sections of bovine and goat leather samples showed that with a high percentage of nanoclay, particle agglomeration is partially visible. The results of the vertical flammability test also showed that the presence of clay nanoparticles reduced the burning length of leather samples. Tensile strength of bovine leather samples containing clay nanoparticles increased compared to the control sample. However, the tear strength of them did not differ significantly. Note de contenu : - EXPERIMENTS : Materials and equipment
- PROCEDURE : a) Washing - b) Neutralization - c) Retanning - d) Fixation - e) Nano clay addition - f) Dyeing and fatliquoring - g) Washing and drying
- RESULTS AND DISCUSSION : Thermal stability - Morphology - Tensile and tear strength - Flame retardancy properties
- Table 1 : Outline formulation of process
- Table 2 : Samples description
- Table 3 : Mechanical properties of leather samples
- Table 4 : Burning length of bovine leather
- Table 5 : Burning length of goat leatherDOI : https://doi.org/10.34314/jalca.v115i11.4181 En ligne : https://drive.google.com/file/d/1S2qwkHR7LATO84gxJoGFMvRp6wNHmAzz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34849
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 11 (11/2020) . - p. 418-427[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22419 - Périodique Bibliothèque principale Documentaires Disponible Quantification and prediction of visually perceived specular gloss at three illumination/viewing geometries / Fereshteh Mirjalili in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
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Titre : Quantification and prediction of visually perceived specular gloss at three illumination/viewing geometries Type de document : texte imprimé Auteurs : Fereshteh Mirjalili, Auteur ; Siamak Moradian, Auteur ; Farhad Ameri, Auteur ; Mohammad Amani Tehran, Auteur Année de publication : 2016 Article en page(s) : p. 239-256 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique)
Eclairage
Evaluation visuelle
Mesure
vision des couleursTags : 'Brillant spéculaire' 'Evaluation visuelle' 'Niveau de brillance achromatique' 'Eclairage unidirectionnel' 'Brillance mètre trois angles' Index. décimale : 667.9 Revêtements et enduits Résumé : In the present study, attempts were made to clarify the existence of a correlation between visually perceived and instrumentally measured specular gloss of a series of achromatic samples. To this end, seven achromatic physical scales of specular gloss each consisting of 10 or 11 samples were prepared using lithographically printed black, white, and five in between gray papers. The samples were visually assessed and subsequently quantified in terms of a visually uniform color constant lightness scale, by a panel of 14 observers in an especially designed unidirectional light compartment at three illumination/observation geometries, namely 20°/20°, 60°/60°, and 85°/85°. Four statistical parameters were utilized to determine the correlation between visually perceived and instrumentally measured specular gloss. The results show that the instrumental 60°/60° geometry is capable of efficiently quantifying the equivalent specular gloss as perceived by a human observer. Surprisingly, it was also possible to accurately predict the visually quantified specular gloss both at the 20° and the 85° geometries by the aid of applying special linear relationships derived from the instrumentally measured specular gloss of the 60° geometry. Note de contenu : - EXPERIMENTAL : Preparation of specular gloss scales - Instrumental characterization - Visual assessments
- RESULTS AND DISCUSSION : Correlation between visual results and instrumental measurementsDOI : 10.1007/s11998-015-9756-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9756-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26109
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 239-256[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17962 - Périodique Bibliothèque principale Documentaires Disponible Spectral dependence of colorimetric characterisation of scanners / Hossein Fashandi in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)
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Titre : Spectral dependence of colorimetric characterisation of scanners Type de document : texte imprimé Auteurs : Hossein Fashandi, Auteur ; Seyed Hossein Amirshahi, Auteur ; Mohammad Amani Tehran, Auteur ; Saeideh Gorji Kandi, Auteur Année de publication : 2011 Article en page(s) : p. 240-245 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Tags : 'Caractérisation colorimétrique' 'Module balayage' 'Propriétés spectrales' Index. décimale : 667.3 Teinture et impression des tissus Résumé : The spectral dependence of the colorimetric characterisation of a typical scanner was investigated. Different colour sets, including ColorChecker SG, Kodak Q-60 colour input target, a set of plain woven coloured fabrics with a large colour gamut, and randomly selected samples of the Munsell Book of Color were used as training and testing sets in the colorimetric characterisation of a scanner by employing a non-linear regression method. The coefficient matrices were optimised for each particular media in the training stage and used to predict the device-independent colorimetric data, i.e. CIELab values of other media from their corresponding RGB values measured by the scanner. In order to extract the differences between the applied sets and determine the actual dimensions of their reflectance spectra, the principal component analysis technique was employed. As expected, it was observed that the different sets benefit from diverse dimensional properties and, in some cases, the spectral behaviours of the first few eigenvectors were apparently different. It was demonstrated that scanner colorimetric characterisation depended on the spectral properties of the applied colour set in the training stage and, consequently, the testing errors increased with increasing the spectral dissimilarity between the sets that were used in training and testing sequences. It was concluded that, to achieve better colour reproduction results, the scanner should be characterised for each media with specific spectral properties. Note de contenu : - Sample sets
- Spectrophotometric measurements
- Scanner characterisationDOI : 10.1111/j.1478-4408.2011.00305.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11904
in COLORATION TECHNOLOGY > Vol. 127, N° 4 (2011) . - p. 240-245[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013185 - Périodique Bibliothèque principale Documentaires Disponible