PVA HWF-17 is usually used as a surface treatment agent for paper and paperboard. When higher coverage isrequired, HWF-05 or HWF-08 may be applied. A sizing solution of 2-5% is used, with a plasticizer for example glycerol, an insolubilizer for example glyoxal and defoamer added to the solution. A wax emulsion (10-50% of the weight of PVA ) may be added to prevent sticking to the dryer and staining on the calendar roll. Metallic stearates and rosins may also be applied.The applications of PVA for paper industry are listed as follows.