Typically, the standard widths for paper rolls produced in China include 1575mm, 1092mm, 880mm, and 787mm, among others. These paper rolls are required to be wound with consistent tension, feature neatly trimmed edges, have splices that lie perfectly flat, and bear conspicuous markings. In the printing industry, relevant technical standards are continuously being refined; for instance, national standards now specifically regulate the ink color and transparency requirements for cold-set web offset printing. These rolls are supplied for use in various industrial applications, such as rotary printing and automated packaging. Furthermore, paper rolls are widely utilized in daily life-for products such as toilet paper-where adherence to relevant national standards ensures product quality.
Paper rolls consist of paper stock produced on a paper machine and subsequently slit and rewound into cylindrical rolls of specific widths and diameters that comply with either national standards or user specifications; simply put, they can be defined as paper wound into a cylindrical form. Nowadays, 880mm-wide paper rolls can be directly slit to produce A4 copy paper; since the shorter dimension of an A4 sheet measures 210mm, this width allows for four simultaneous cuts-plus necessary edge trimming-in a single operation.
