| Abstract:In order to study the life-expectancy and difference in aging resistant properties of different papers, dry heat aging experiments of different paper samples (paper made from bamboo, Xuan paper, newsprint, dictionary paper and paper made from mulberry) were conducted. The brightness and mechanical strength (tensile strength, tearing resistance and folding endurance) of different papers during aging process were analyzed. Furthermore, the chemical properties (viscosity, copper number and pH) of paper were tested to search the immanent cause of paper ageing. Results indicated that ageing resistance stabilities of different kinds of paper were different. The aging resistant property of paper greatly depended on initial mechanical strength. The decrease of mechanical strength was closely related to the hydrolysis/oxidation of fiber. The pH value of the paper made from bamboo was not quite stable, it is necessary to prevent it from acidification then accelerating aging in long time storage. |
