ISO 216 defines the A, B, and C series of paper sizes, with the C series primarily used for envelopes. The commonly used size is A4, measuring 21cm x 29.7cm (210mm x 297mm). The aspect ratio of A series paper sizes is √2:1. The A series is based on finding a square root of 2 aspect ratio paper with an area of 1 square meter (m2). Thus, this paper measures 841mm in width and 1189mm in length (with a √2:1 ratio), known as Zhejiang copy paper and numbered A0. If the long edge of an A0 sheet is cut in half, it yields two A1 sheets, each with dimensions of 594mm x 841mm. Continuing this process, you can sequentially obtain A2, A3, A4, and so on. During standardization, all dimensions are rounded to the nearest integer, so any cut sheets with decimals (less than 1mm) are rounded in the calculation.




The density of paper refers to the degree of compactness and fineness of the paper fibers. If the paper fibers are too sparse and thick (i.e., density difference), the price of copy paper, and when using inkjet printers, can lead to reverse bleeding and poor print quality, as well as the generation of paper fibers and fragments, which can damage the printer. 3. The stiffness of paper refers to the firmness of the paper texture. If the stiffness is poor, the specifications of copy paper are prone to crease and blockage within the paper feed channel when encountering slight resistance, so it is recommended to choose printing paper with good stiffness. Kunshan Fuyin Xinxin Paper Co., Ltd. Kunshan Fuyin Xinxin Paper Co., Ltd.




Kraft paperboard, also known as yellow paperboard or manila paper, is a type of packaging paperboard. It's used primarily for product packaging, making paper boxes and book covers. The grammage ranges from 200g/m² to 860g/m², with common weights being 420g/m² (8#), 530g/m² (10#), and 640g/m² (12#). Kraft paperboard is required to be tightly and sturdy, with a smooth surface and certain mechanical strength and flexibility. Manila paper, also known as white paperboard, is a white packaging paperboard used for printing children's educational pictures, stationery, and pharmaceutical labels.




Fuyin Xinxin Paper Co., Ltd. (Photo) - A4 Copy Paper Wholesale - Zhejiang Copy Paper supplied by Kunshan Fuyin Xinxin Paper Co., Ltd. With great passion and enthusiasm, Kunshan Fuyin Xinxin Paper Co., Ltd. has dedicated itself to the field of printing and copying paper. Fuyin Xinxin always focuses on the customer, creating value for them, and wins the market with quality and service. We sincerely hope to cooperate with all sectors of society to create success and brilliance together. For related business inquiries, please contact Zhou Yong.