Several kinds of paper such as newsprint

duplicating paper

brown paper and writing paper were irradiated by electron beam with different doses. Some physical properties were measured. When irradiated by 20-30 kGy

less than 25% of changes occurred on base weight

brightness

tear resistance

tensile strength and folding endurance for duplicating paper

showing that the paper kept at B level after the irradiation. The results are analyzed

and the mechanism of radiation effects is discussed.