Grime

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Chemical deterioration due to dirt which is typically a combination of air-borne soot, nicotine, cooking oils, smudges, and finger and palm marks that has accumulated on the surface of an object and may also be embedded into the support. 
==Related Terms==
Surface dirt, surface deposit, accretion, soiling
=== Synonyms in English ===
Filth, dirt, stain, soot, grunge, dust, soil
=== Translation ===
English 	grime
French 	crasse
Spanish 	mugre
Portuguese 	sugiera
Italian 	sporcizia
German 	shumutz
Arabic 	سخام
Chinese (Traditional)	油垢
==Discussion==
Grime is a disfiguring deposit on or ingrained in the surface of a object.(CCI, 1994) Grime can be in the varnish, on top of the paint layer, or on top of the varnish (Smithsonian, Painting Conservation). It is also surface dirt or dirt embedded in the finish of a piece of furniture (The Fine Arts Conservancy).
Pollutants in the environment can cause grime to be deposited on objects “Particulates circulating through unfiltered ventilation systems may deposit grime, soot, and abrasive dirt on the face of documents and other surfaces”(van der Reyden, 1995). Dirt, dust, grime and gaseous pollutants can harm fabric and accelerate its deterioration (CCI, 2002).
Paintings installed above a heat source will experience more grime than paintings installed elsewhere because heat softens the paint and varnish layers making it easier for dirt and debris to be trapped (Smithsonian, Caring for your Painting).
Improper handling of objects can cause grime to accumulate on paper and objects made of other materials. ”To prevent transferring body oils or grime, hands and gloves should be cleaned frequently" (van der Reyden, 1995).
In addition to improving the condition of an object, removing grime can improve visibility, such as with paintings and works on paper and documents (CCI, 2013). It is also important that any grime which can cause abrasion be removed before objects are put into storage or packed for shipment (van der Reyden, 1995)(Marcon, 2011).
When conditioning an object, descriptions of the surface should include any surface dust, dirt and/or grime (CCI, 2013).
General recommendations for minimizing the deleterious effects of grime include a clean environment, installation of objects away from heat sources, and handle objects as little as possible and always with clean hands and/or gloves. Protect objects from dust and grime to reduce the need for cleaning.(CCI, 2007)
==References==
Canadian Conservation Institute (CCI). Condition Reporting - Paintings. Part III: Glossary of Terms - CCI Notes 10/11, 1994 http://www.cci-ic.c.gc.ca/publications/notes/10-11-eng.aspx
Smithsonian Museum Conservation Institute. Painting Conservation Glossary of Terms, http://www.si.edu/MCI/english/learn_more/taking_care/painting_glossary.html
The Fine Arts Conservancy. Glossary http://www.art-conservation.org/GLOSS_Paint.html
van der Reyden, Dianne. In Storage of Natural History Collections: A Preventive Conservation Approach, Vol. I, edited by Carolyn L. Rose, Catharine A. Hawks, and Hugh H. Genoways, (1995) entitled "Paper Documents" on pp. 327-353. http://www.si.edu/MCI/downloads/RELACT/paper_documents.pdf
How to Care for Textiles.CCI, 2002 http://www.cci-icc.gc.ca/caringfor-prendresoindes/articles/423-eng.aspx
Smithsonian Museum Conservation Institute. Caring for your Paintings http://www.si.edu/MCI/english/learn_more/taking_care/care_painting.html
Condition Reporting - Paintings. Part II: Examination Techniques and a Checklist - CCI Notes 10/7 part of CCI Notes Series 10(Paintings and Polychrome Sculptures, 2013 https://www.cci-icc.gc.ca/publications/notes/10-7-eng.aspx
Marcon, Steve. Six Steps to Safe Shipment. CCI, 2011. https://www.cci-icc.gc.ca/caringfor-prendresoindes/articles/sixsteps-sixetapes/index-eng.aspx
Care of Ceramics and Glass - CCI Notes 5/1 part of CCI Notes Series 5 (Ceramics and Class). CCI, 2007. http://www.cci-icc.gc.ca/publications/notes/5-1-eng.aspx
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