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Color simulation method for accurate prediction of resulting dyed hair color / T. Takahashi in IFSCC MAGAZINE, Vol. 9, N° 2 (04-05-06/2006)
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Titre : Color simulation method for accurate prediction of resulting dyed hair color Type de document : texte imprimé Auteurs : T. Takahashi, Auteur ; Yutaka Tango, Auteur ; Koichi Shimmoto, Auteur ; Tsuyoshi Ogihara, Auteur ; Shigeyoshi Momose, Auteur Année de publication : 2006 Article en page(s) : p. 123-128 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Hair color' dye' 'Three layers model' 'light-transmittance' Prediction Simulation Device Apparatus Index. décimale : 668.5 Parfums et cosmétiques Résumé : When choosing hair dyes, it is natural for the user to assume that the final hair color will resemble the color indicated on the product container or color chart. Often, however, the result is quite different. The ability to accurately predict resulting hair color after dyeing is essential, but not easy to attain because hair varies significantly from person to person. In this paper, a new method for predicting the dyed hair state is proposed. Our method is based on a model, where the observed final color consists of contribution from three layers of the hair structure: a melanin-containing layer, a bleached layer and a pigment-colored layer. A method for predicting the final color from responses in each layer is introduced. In this method, response formulae for each layer are derived from the energy balance, and the predicted hair color after dyeing is obtained by calculating the each equation assuming that the hair state before dyeing is solely because of the contribution from the melanin-containing layer. In addition, a small measuring apparatus utilizing this prediction method was developed and the effectiveness of our method demonstrated by data obtained before and after the hair dyeing. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10850
in IFSCC MAGAZINE > Vol. 9, N° 2 (04-05-06/2006) . - p. 123-128[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008185 - Périodique Bibliothèque principale Documentaires Disponible Validation of the reciprocity law for coating photodegradation / Joannie W. Chin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 7 (07/2005)
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Titre : Validation of the reciprocity law for coating photodegradation Type de document : texte imprimé Auteurs : Joannie W. Chin, Auteur ; Tinh Nguyen, Auteur ; Eric Byrd, Auteur ; Jonathan W. Martin, Auteur Année de publication : 2005 Article en page(s) : p. 499-508 Note générale : Bibliogr. Langues : Américain (ame) Tags : Loi Schwarzschild Aminoplaste Propriété chimique Etude expérimentale Spectrométrie FTIR comparative Prédiction réciprocité Modélisation Résistance intempérie Durabilité Mécanisme réaction Dose rayonnement Temps exposition Acrylique dérivé polymère Mélamine résine Vieillissement accéléré produit Dégradation photochimique Matériau revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : Accelerating the photodegradation of commercial polymeric materials has great practical importance in the weathering community. However, questions exist as to whether high radiant flux exposure results can be extrapolated to in-service exposure levels. Based on the reciprocity law, the photoresponse of a material is dependent only on the total energy to which the specimen is exposed, and is independent of the exposure time and the intensity of the radiation taken separately. An experiment to validate the applicability of the reciprocity law for polymeric coatings has been carried out using the NIST integrating sphere-based ultraviolet (UV) weathering device. A nonpigmented, non-UV stabilized acrylicmelamine coating was exposed to six different UV radiation intensities ranging from 36 W/m2 to 322 W/m2, and in the spectral region between 290 nm and 400 nm. Chemical changes in the coating due to UV exposure were measured with transmission Fourier transform infrared (FTIR) spectroscopy and UV-visible spectroscopy. Using two dose-damage models, the reciprocity law photo response for this polymeric system was verified for different photodegradation mechanisms, including chain scission, oxidation, and mass loss. DOI : 10.1007/s11998-005-0009-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-005-0009-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3797
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 7 (07/2005) . - p. 499-508[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002327 - Périodique Bibliothèque principale Documentaires Disponible