Chemistry Journal of Moldova

ECOLOGICAL CLEANING SYSTEMS FOR OLD ICONS PAINTED IN TEMPERA

Author(s):

Silvea Pruteanu, Petronela Spiridon, Viorica Vasilache, Ion Sandu


Field: Ecological chemistry
Type: Research paper
Issue: 2014 Volume 9, no.2
Pages: 26-31
Keywords:

degraded varnish, deposits of dirt on tempera, wash tests, solvents, vegetable extracts, decoction of dried plants, CIE colorimetry reflection L*a*b*


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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).04

Graphical Abstract:
 Old icons, especially those involved in liturgical rituals are affected in time by external agents factors (temperature, humidity, light, pollution, microbiological attack, abrasion etc.), resulting changes of the appearance. Based on the literature in the field, a series of alcoholic solutions of different concentrations were made, as such or basified, which were compared with ecologic synergic systems based on organic uncolored vegetable juices and decoctions from dried plants. The cleaning effectiveness was done by visual analysis and CIE L * a * b * reflection colorimetry, this technique permitting to determine by color deviations the critical point where the patina and polychromy.



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