White kraft paper is one of the types of kraft paper. Generally, the colors of kraft paper are mainly yellow, natural, white on one side, yellow on both sides, and white on both sides. The white kraft paper is double-sided white kraft paper. It has the characteristics of breaking resistance, smoothness, tensile strength, tearing degree and water absorption. White kraft paper is commonly used as kraft paper products in handbags, hand bags, and packaging bags. There are many types and different quality of the kraft paper. What are the methods to easily check the quality of the white kraft paper?