The application of x-ray powder diffraction for the analysis of synthetic organic pigments. Part 1: dry pigments / Suzanne Quillen Lomax in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 3 (05/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 3 (05/2010) . - p. 331-346 Titre : The application of x-ray powder diffraction for the analysis of synthetic organic pigments. Part 1: dry pigments Type de document : texte imprimé Auteurs : Suzanne Quillen Lomax, Auteur Année de publication : 2010 Article en page(s) : p. 331-346 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diffractométrie de rayons X Phtalocyanine de cuivre Pigments organiques Polymorphisme (cristallographie) Quinacridone Les pigments de quinacridone sont des pigments organiques de synthèses qui vont du rouge-orange au rouge-violet. Ils sont utilisés depuis les années 1960 par les teinturiers et les fabricants de pigment set couleurs à peindre (et plus récemment par certains tatoueurs, comme pigment dans des encres de tatouage, avec un risque allergique). Il s'agit de pigments très transparents, au fort pouvoir colorant mais modérément couvrants. Leur transparence permet de varier les teintes selon la densité et l'épaisseur de l'application. Index. décimale : 667.9 Revêtements et enduits Résumé : This paper presents x-ray powder diffraction data for over 200 synthetic organic pigments. These pigments, most manufactured in the last 130 years, are frequently found in modern works of art. Their identification is of interest in the field of art conservation for the purposes of dating works of art as well as making conservators and curators aware of issues with lightfastness and solubility. Most classes of these pigments, including β-naphthol, Naphthol AS, mono- and di-arylide yellows, quinacridones, copper phthalocyanines, benzimidazolones, and perylenes give good diffraction data. Some pigments, including certain triarylcarbonium and some other metal containing pigments, especially aluminum containing pigments, were found not to diffract. X-ray powder diffraction is of great use in distinguishing polymorphs of pigments such as quinacridones and copper phthalocyanines. DOI : 10.1007/s11998-009-9206-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9206-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9821 [article]

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The application of x-ray powder diffraction for the analysis of synthetic organic pigments. Part 2 : artists' paints / Suzanne Quillen Lomax in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 3 (05/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 3 (05/2010) . - p. 325-330 Titre : The application of x-ray powder diffraction for the analysis of synthetic organic pigments. Part 2 : artists' paints Type de document : texte imprimé Auteurs : Suzanne Quillen Lomax, Auteur Année de publication : 2010 Article en page(s) : p. 325-330 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diffractométrie de rayons X Liants Pigments organiques Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : Over 50 commercial paints were examined by x-ray powder diffraction in order to try and identify the synthetic organic pigments present. The binders included acrylic, oil, gum, and alkyd. Some pigments could be identified, though analysis is often complicated by the presence of large amounts of fillers and extenders in the paints relative to the small quantities of the pigment. A few of the paints did not have reflections due to fillers or extenders but the pigments could still not be identified. The best success in identifying the pigments was with acrylic binders, where the pigments could be identified in more than half of the samples examined, and with alkyds, where the pigment could frequently be identified. However, other binders, especially oil and gum, contain so many fillers that the pigment reflections are obscured. X-ray powder diffraction, therefore, is of limited utility in the identification of synthetic organic pigments in paints. DOI : 10.1007/s11998-009-9205-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9205-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9812 [article]

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