Behaviour of Paper Documents after Irradiation.

The article focuses on a research conducted in order to examine the effects of post-radiation on various kinds of paper. This effect was examined on the basis of changes in relative humidity, the type of the light source and the change on secondary irradiation. The research revealed that post-radiation effect (PRE) is more intense for materials irradiated by a source of daylight as compared to a high ultraviolet source. Following irradiation by daylight, there is a rapid increase on the dependence of PRE on the relative humidity between values of 53 percent and 62 percent.