Traditional science in pigments and recipe of painting woodcarving in medieval Assam, India / Asadulla A. Ali in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1595-1609 Titre : Traditional science in pigments and recipe of painting woodcarving in medieval Assam, India Type de document : texte imprimé Auteurs : Asadulla A. Ali, Auteur ; Robin K. Dutta, Auteur Année de publication : 2023 Article en page(s) : p. 1595-1609 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antiquités (objets anciens) -- Analyse Antiquités (objets anciens) -- Conservation et restauration Couleur -- Analyse Pigments Revêtements:Peinture Tags : 'Pigments  traditionnels'  'Peinture  traditionnelle'  'Sculptures  sur  bois'  'Manuscrits  Sāncipat'  'Hengul-Haital'  'Analyse  des  couleurs' Index. décimale : 667.6 Peintures Résumé : A painting tradition of medieval Assam, popularly known as Hengul-Hāitāl, has been studied with an aim of restoring and conserving centuries-old woodcarvings and Sāncipat manuscripts for preserving in ordinary open conditions at villages and Vaishnavite monasteries. The pigments, their combinations for producing various shades and the resulting colors have been characterized using various physicochemical techniques. The study unravels some interesting traditional science, such as, using red Hengul (cinnabar), yellow Hāitāl (yellow orpiment) and blue Nīl (Indigo or Prussian blue) as primary colors to produce any desired shade, inclusion of either or both of Hengul and Hāitāl in every shade to repel fungi and insects, applying Kharimāti (a clay) as a wood-primer for better painting effects, choosing of Bael gum as a robust non-staining natural adhesive and finally varnishing with Lā (a natural lac) to protect the pigments from natural erosion and protect the woodcarving from humidity and contaminating hands touching them. The findings provide clues to develop an appropriate method of restoration of partially worn-out woodcarvings for preserving them in ordinary open conditions, based on the traditional method of preparation. Note de contenu : - MATERIALS AND METHODS : Materials - Instrumental analysis - Preparation of shades of pigments with binders - Hunter color analysis method - Measurement of hiding power - RESULTS AND DISCUSSION : Morphological and elemental analysis - FTIR and Raman spectra - XRD analysis - Thermal analysis - Impurities in the pigments - Analysis of paints of different shades prepared from the pigments - Traditional science in the painting tradition - Table 1 : Ratio of volumes of the pigments, binder, and water in mL mixed to prepare paints of various shades with their average (of at least four measurements) particle size measured in Hegman scale - Table 2 : Results of Hunter color analysis of the compositions as described in Table 1 except for the binder gum which here includes both Bael gum and a starch-based commercial gum with same proportions DOI : https://doi.org/10.1007/s11998-023-00765-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00765-8.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39974 [article]

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