Câmaras climáticas para o envelhecimento acelerado: ação de microambientes sobre bens culturais

Abstract

Recebido em 31/8/08; aceito em 15/6/09; publicado na web em 27/11/09 ENVIRONMENTAL CHAMBERS FOR THE ACCELERATED AGEING: EFFECT OF MICROCLIMATES ON CULTURAL HERITAGE. Environmental chambers were designed for the accelerated ageing of materials used in artistic artifacts to study the synergistic action of temperature, humidity, UV and visible radiation and gaseous pollutants. Two inox-steel/PTFE compartments are kept under controlled temperature and relative humidity, whose values are transmitted to a PC, which stores, plots in real time and continuously feedback heating and humidifying devices through logical signals. A borosilicate, or quartz, window allows the irradiation inside the chamber from an external source. A flow of purified air purges the chamber and conveys selected pollutants from an external source. Each independent compartment works under either stationary or cyclic conditions.