White cardboard is a strong, thick, thick paper. In the past, it was proposed to use quantification as a benchmark to divide: paper, cardboard, and paperboard; in the early years, white thick paper with a basis weight of 200g/m2 was weighed at a Shanghai shopping mall (the surface was smooth, calendered, and high in stiffness; some people also called thin cardboard. ), Weighing lbs. In fact, it is also a kind of paper jam. The most common paper jams are not colored and they are known as white cardboard. If colored, the color is called color paper. The white cardboard name is "white", so the whiteness requirement is very high. The whiteness of A, etc. is not less than 92%, that of B is not less than 87%, and that of C, etc. is not less than 82%. If the whiteness is over 90%, it is a bit "bright and dazzling". White cardboard also requires high stiffness, bursting resistance, and smoothness (except for embossed white cardboard). Paper is smooth, not streaky, spotted, etc., and there must be no warpage. Deformation occurs. White cardboard is promising in China's market. In the past, many white paperboards used by foreign-related hotels and joint ventures in China were imported from abroad. Today, the rise of Ningbo Zhonghua Paper has changed the situation in which imported paper rules China's white cardboard market. Ningbo Zhonghua Paper adopts bleached chemical wood pulp, first-class processing equipment and advanced technology. Therefore, the finished product is of extremely high quality, comparable to imported products, and the price is much lower than that of imported products. The single copper paper surface is bright, uniform in coating, and quickly absorbs ink with good printability, and is suitable for exquisite color printing. For the purpose of exquisite printing, the surface of the base paper is coated with a coating material and is coated with a super-calender machine. Double copper paper is divided into single-sided and double-sided coated copperplate paper, with a coating weight of about 10g/m2 or more per side according to the Japanese Paper Industry Classification Standard. It is the most commonly used for cultural publishing, advertising design, printing and binding, and industrial and commercial circles. One of the paper types The multifunctional bag Mianyang Crossing Cross-Border E-Commerce Co., Ltd. , https://www.wycypets.com
The main purpose of white cardboard is to print business cards, certificates, invitations, covers, calendars for the month, postal postcards, etc.
2. The offset paper is the printing paper, also called the offset paper, like our book is printed with offset paper (but the paper like Ruili and other fashion magazines has a slippery surface, with a gloss coating called double copper. Paper), generally between 60 and 120 grams, and 150 grams of high-gram weight offset paper. Less than 60 grams is not called double-glue and is called writing paper, writing is a relatively poor type of paper.