00000nam 2200000za 4500 9.862227 CaOODSP 20221107160948 cr ||||||||||| 180920s1975 oncad ob f000 0 eng d CaOODSP eng eng fre n-cn--- CH57-3/1-1-1975E-PDF Macleod, K. J. (Kenneth J.), 1932- Relative humidity [electronic resource] : its importance, measurement, and control in museums / K. J. Macleod. Ottawa : Canadian Conservation Institute, National Museums of Canada, 1975. 15 p. : charts, ill. Technical bulletin ; no. 1 Issued also in French under title: L'humidité relative dans les musées : importance, mesure et regulation. "April 1975." Digitized edition from print [produced by Canadian heritage]. Includes bibliographical references. "Moisture in the atmosphere plays a substantial role in the deterioration of works of art and museum objects. In this bulletin the relative humidity or RH, a measure of the moisture content of air, is described and the part it plays, sometimes in conjunction with atmospheric pollutants, is discussed in terms of the cracking and flaking of paint layers, the shrinking of wood, the cockling of parchment and paper, the corrosion of metal, the growth of moulds and fungi, etc., A range of acceptable RH values is suggested for museums. Some of the equipment available for monitoring relative humidity is described and the techniques available for controlling it are briefly discussed"--Abstract, p. 1. Issued also in print format. Includes abstract in French. gccst Museums gccst Conservation gccst Humidity gccst Control Canada. Canadian Heritage. Canadian Conservation Institute. L'humidité relative dans les musées (CaOODSP)9.862237 Technical bulletin (Canadian Conservation Institute) no. 1. (CaOODSP)9.806394 PDF 6.74 MB https://publications.gc.ca/collections/collection_2018/pch/CH57-3-1-1-1975-eng.pdf