00000nam 2200000za 4500 9.835391 CaOODSP 20221107150643 cr ||||||||||| 170419s2016 onca ob f000 0 eng d CaOODSP eng n-cn--- NM95-57/9-11-2016E-PDF Selwyn, Lyndsie. How to make and use a precipitated calcium carbonate silver polish [electronic resource] / [by Lyndsie Selwyn]. [Ottawa] : Canadian Conservation Institute, c2016. 18 p. : ill. (mostly col.) Canadian Conservation Institute (CCI) notes, 1928-1455 ; 9/11 Issued also in French under title: Comment fabriquer et utiliser un agent de polissage de l’argent à base de carbonate de calcium précipité. Cover title. Includes bibliographical references. "When tarnish removal is necessary and acceptable, one of the options is to use an abrasive polish. CCI Note 9/7 Silver — Care and Tarnish Removal lists several kinds of abrasive polishes. Most are commercial polishes, but one is simply a slurry of precipitated calcium carbonate in water. The current Note discusses how to prepare and use silver polish made with precipitated calcium carbonate. This polish is considered mild because it does not remove too much of the silver under the tarnish. Using this silver polish avoids using commercial polishes, which may contain unknown abrasives or additives that are harmful to the object. The procedure described here is suitable for silver objects (either silver-plated or a silver alloy) that can be rinsed with water without damaging associated materials like wood or ivory. A laboratory and ventilation are not required unless organic solvents are used. Prior to using a chemical or solvent, consult its safety data sheet (SDS) for health and safety information"--Introd., p. 3. gccst Artefacts gccst Precious metals gccst Conservation gccst Restoration Canada. Canadian Heritage. Canadian Conservation Institute. Comment fabriquer et utiliser un agent de polissage de l’argent à base de carbonate de calcium précipité (CaOODSP)9.835392 CCI notes, 1928-1455 ; 9/11 (CaOODSP)9.506353 PDF 1.16 MB https://publications.gc.ca/collections/collection_2017/pch/NM95-57-9-11-2016-eng.pdf