纸张（paper）.docVIP

纸张（paper） 1pt=0.01066 inch =0.2708mm, a thickness unit, is widely used in the printing industry. Double adhesive commonly used straw pulp, 50 grams -80 grams. White cardboard is made from total wood pulp, 200 grams -500 grams. White board paper is usually recycled from waste paper and waste packing boxes, and weighs almost as much as white cardboard. Grey Board definition The grey board is made from a kind of recycled waste paper. Products are divided into single ash, double ash, all gray, belonging to environmentally friendly packaging materials. Products: packing boxes, advertising boards, folders, frames, back, bags, hardcover books, boxes, samples, linings, partitions and so on. Paper properties 1., quantitative, it refers to the weight of the unit area of paper, expressed in g/m2, that is, a square meter of paper weight. The amount of paper determines the physical properties of the paper, such as tensile strength, tear, compactness, stiffness and thickness. Therefore, according to the characteristics of equipment, it is possible to reduce the consumption and improve the product quality and equipment efficiency by arranging quantitative printing with corresponding printed parts. 2. it is the degree of thickness of paper thickness measuring unit, usually expressed in mm. Thickness and quantitative and tightness are closely related, in general, the paper thickness is large, and its quantitative corresponding to high, but the relationship between the two is not absolute. Some papers are thin, but their quantity is equal to or thicker than that of thicker ones. This shows that the degree of tightness of the fiber structure of the paper determines the quantity and thickness of the paper. From the point of view of using effect, it is very important to have uniform paper thickness. Otherwise, it will affect the automatic renewal of paper, sizing and so on. 3. tightness, it refers to the weight of the paper per cubic centimeter. The tightness of the g/cm3. paper is calc