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A comparative study of the dependency of colour measurement on surface temperature / Jiangning Che in COLORATION TECHNOLOGY, Vol. 132, N° 2 (04/2016)
[article]
Titre : A comparative study of the dependency of colour measurement on surface temperature Type de document : texte imprimé Auteurs : Jiangning Che, Auteur ; Rong Li, Auteur ; Muditha Senanayake, Auteur Année de publication : 2016 Article en page(s) : p. 144-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
Etudes comparatives
Matériaux céramiques
Spectrophotométrie
Teinture -- Fibres textiles
Température
ThermochromieIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In this paper, we evaluated in depth how the spectrophotometric colour measurement of an object will respond to surface temperature change. The colorimetric variations of eight coloured ceramic tiles against temperature changes were studied. Colorimetric data measured at specific temperature were compared with data measured at about 20 °C. For each coloured ceramic tile, reflectance curves and colorimetric differences resulting from temperature differences were examined to demonstrate the exact dependency of colorimetric properties across the temperature range studied. Experimental data showed that peaks and slopes on a reflectance curve are the major impact resulting from temperature variation. Colours with lower lightness and lower chroma showed smaller colorimetric changes with change in temperature, while colour with higher lightness and chroma exhibited a distinct thermochromism and linearity changes across the temperature range. A conspicuous correlation potential between surface temperature and CIE colorimetric coordinates was observed. Note de contenu : - The colorimetric data of coloured ceramic tiles
- The reflectance curves of the colours against temperature change
- The effect of temperature variation on colour difference changes against the 20°C measurement
- The effect of temperature changes in CIE L*, a*, b* C*, and H* against the 20°C measurementDOI : 10.1111/cote.12202 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12202 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25865
in COLORATION TECHNOLOGY > Vol. 132, N° 2 (04/2016) . - p. 144-152[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18025 - Périodique Bibliothèque principale Documentaires Disponible A study of spectral reflectance reconstruction using the weighted fitting algorithm based on the Sino Colour Book / Yuexin Liu in COLORATION TECHNOLOGY, Vol. 140, N° 1 (02/2024)
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Titre : A study of spectral reflectance reconstruction using the weighted fitting algorithm based on the Sino Colour Book Type de document : texte imprimé Auteurs : Yuexin Liu, Auteur ; Juan Li, Auteur ; Xin Wang, Auteur ; Xuetong Li, Auteur ; Yang Song, Auteur ; Rong Li, Auteur Année de publication : 2024 Article en page(s) : p. 61-74 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algorithmes
Couleur -- Analyse
Spectroscopie de réflectanceIndex. décimale : 535.6 Couleur Résumé : The spectral reflectance of a colour is its most essential characteristic, and it does not change with changes of equipment or light source. Therefore, the reconstruction of spectral reflectance from parameters such as colour tristimulus value and RGB has attracted the attention of researchers. To avoid the occurrence of metamerism in the colour reproduction process and to achieve the purpose of colour spectral reproduction, the spectral reflectance and the optimal parameters of the reconstruction using the weighted fitting method were discussed experimentally with the colour data measured from the Sino Colour Book as the research object. The results show that the best results are obtained when the weighted fitting parameters are weighted by the third power and eight colour samples are involved in the fitting. The reconstructed spectral reflectance obtained by the weighted fitting method has little variation and high overlap with the actual spectral reflectance obtained at each hue and lightness, thus meets the requirements of practical applications. Note de contenu : - EXPERIMENTAL : Experimental samples: the Sino Colour Book
- THEORY : Weighted fitting algorithm - The relationship between spectral reflectance and colour tristimulus values
- EVALUATION METHODS : Colour difference - Spectral angle θ - Spectral index k - RMSE of the spectrum - Spectral similarity - Reconstruction pass rate
- RESULTS AND DISCUSSION : Influence of the weighted fitting parameters m and n on the reconstruction effectiveness - Spectral reflectance reconstruction effect evaluation
- Table 1 : Influence of the weighting power
- Table 2 : Influence of colour sample numbers involved in fittingDOI : https://doi.org/10.1111/cote.12691 En ligne : https://drive.google.com/file/d/19OMlDxhoKtj6F2XGerdCwXlHALBvlN9B/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40391
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Code-barres Cote Support Localisation Section Disponibilité 24413 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and application to cellulose of reactive dye precursor of anti-bacterial N-halamine / Zhiming Jiang in COLORATION TECHNOLOGY, Vol. 133, N° 5 (10/2017)
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Titre : Synthesis and application to cellulose of reactive dye precursor of anti-bacterial N-halamine Type de document : texte imprimé Auteurs : Zhiming Jiang, Auteur ; Wenjun Peng, Auteur ; Rong Li, Auteur ; Dan Huang, Auteur ; Xuehong Ren, Auteur ; Tung-Shi Huang, Auteur Année de publication : 2017 Article en page(s) : p. 376-381 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Colorants -- Synthèse
Colorants réactifs
Colorimétrie
Composés organiques -- Synthèse
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).
N-halamine
Teinture -- Fibres textiles
Tests d'efficacitéIndex. décimale : 667.3 Teinture et impression des tissus Résumé : To achieve textile dyeing and functional finishing in one process, a bleach-resistant reactive dye precursor to anti-bacterial N-halamine was synthesised by reacting a type of dichlorotriazine reactive dye with 4-amino-2,2,6,6-tetramethylpiperidine. The synthesised compound, which can be transformed to an N-halamine molecule by exposure to dilute bleach solution, was used to dye cotton fabrics. After exposure to a dilute sodium hypochlorite solution, dyed cotton fabrics showed excellent anti-bacterial properties against Staphylococcus aureus and Escherichia coli O157:H7, facilitating a ca. 6-log reduction in bacteria within a short period of contact. Compared with the dichlorotriazine reactive dye, the reactive dye precursor demonstrated comparable dyeing properties including exhaustion and fixation values. No differences in rub fastness, wash fastness or bleach fastness were detected between fabrics dyed with, respectively, dichlorotriazine reactive dye and the reactive dye precursor to N-halamine. Note de contenu : - EXPERIMENTAL : Materials and instrumentations - Synthesis of chlorine bleach-resistant dye 1 - Synthesis of reactive dye precursor 2 - Dyeing procedure - Chlorination and titration - Colour measurement - Measurement of dye exhaustion and fixation - Fastness - Biocidal efficacy testing
- RESULTS AND DISCUSSION : Preparation of anti-bacterial dyeing cellulose - Dyeing properties - Fastness properties - Anti-bacterial efficacyDOI : 10.1111/cote.12290 En ligne : https://drive.google.com/file/d/1hFPeMYR9nvwPEauFlqCO7G0FAMcUF3H7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29196
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Code-barres Cote Support Localisation Section Disponibilité 19221 - Périodique Bibliothèque principale Documentaires Disponible