[article]
| Titre : |
Multipurpose glazing varnish based on shellac and synthetic resin |
| Type de document : |
texte imprimé |
| Auteurs : |
D. N. Goswami, Auteur ; D. D. Singh, Auteur ; B. Baboo, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 67-88 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Laque et laquage
Polymères
Vernis
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Metal objects/artifacts made of brass, copper, aluminium etc. varnish on exposure to atmosphere. These require periodic cleaning of the oxidative coating by rubbing/polishing formulations. Similarly, other materials like plastic, resin, painted artworks, murals, rubber etc. become dull and unattractive with the passage of time. Restorers/commercially available grinding/polishing formulations do not provide long lasting protection from tarnishing of metal objects ; also require periodic cleaning by rubbing/polishing. Consumers prefer use of coating, which is more permanent in nature and avoids frequent application of restorer.
A varnish formulation based on shellac and synthetic resin, has been developed ; application of double coat (or more, if required) provides sheen on the surface, which remains unaffected for 2-3 years i.e., it eliminates frequent rubbing/polishing of the artefacts. The films of the varnish maitain glossy appearance for a period much longer than that of varnish from shellac alone or compared to commercial rubbing/polishing formulations even after exposure to environmental stress. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7369 |
in PAINTINDIA > Vol. LVIII, N° 2 (02/2008) . - p. 67-88
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