Publisher's Synopsis
Excerpt from 10th Triennial Meeting, Washington, DC, USA, Vol. 2: Preprints; 22-27 August 1993
The two exposure units were built separately so that their parallel use could be possible. The basic construction difference between the two facilities was the kind and number of exposure chambers comprised, as well as the analytical devices present in the facility. By the short-term exposure method, the absorption of pollutants was measured within the first 24 hours. By the long-term exposure method, the total absorption of pollutants into paper samples in block form was analyzed within one month.
The apparatus was based on an atmospheric corrosion testing facility originally developed for examination of the corrosion behavior of metal or stone artifacts It was modified for application to paper samples - small adhesive bound blocks or single leaves - by L. G. Johansson in 1989 It consisted entirely of glass and Te?on (r), and its main advantages were high accuracy in control and regulation of temperature, gas ?ow, rh, and concentration of gaseous pollutants.
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