Surface sizing
A layer of sizing agent is evenly painted on paper or cardboard to improve its hydrophobic properties. Generally, after the press section of the paper machine, a slot-type, roll-type or other sizing device is used to process the paper web, and then drying is completed.
Medium sizing
It indicates that the water resistance of the paper is medium, and the squeezing degree is 0.75 to 1.25 m by the duck bill stylus method.
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