To measure the Degree of curl when one side of the paper sample exposed to water.
PAPER CURL TESTER intended to determine (a) the maximum curvature developed (b) the time required to reach maximum curvature when one side of paper is wet with water. The maximum curvature is an indication of the relative tendency of certain paper, specially printing paper, to cur! under normal conditions of usage. The time required to reach maximum curvature is a measure to relative degree of sizing.