Abstract
Wetting and penetration behaviors of paper with water were investigated by Bristow's test and newly developed ultrasonic attenuation method. Close correlations between the characteristic quantities determined by the two methods were confirmed with a series of test sheets of widely varied sizing levels, both for rosin sizing and alkaline sizing. The coefficient of correlation between wetting delays by the two methods was 0.92, with a proportionality constant of 1.07. The difference from the previous value for commercial papers was ascribed to the surface treatments.
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