Short Study about Removing the Black Crust formed by the Influence of SO2, NOX, CO2 on Saint Michael’s Church Masonry in Cluj-Napoca, Romania, by Chemical and Physical Methods

International Journal of Latest Research in Science and Technology , ID-24-12122013, 2(6), 74-76 (2013) .


A short study of the SO2, NOx, CO2 influence on cultural heritage, as in the case of Sf. Michael's Church Masonry in Cluj-Napoca, Romania is presented; special attention is given to the black crust formation. The composition of the black crust was determined;the black crust was then cleaned with the laser-based chemical method and with the physical method of cellulose plaster soaked in
ammonium hydrogen carbonates [NH4 (HCO3)].

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