The thickness of binding is the thickness of the binding document, usually in millimeter (mm), but some products are measured by binding pages (Zhang Shu). The general binding machine can bind the thickness between 20mm to 50mm, or about 400 pages. Common applications can choose 20mm products. Products with special needs can be selected with greater thickness. This article is collected and collated from the large supermarket of office supplies.
The binding specification refers to the maximum width of perforation and the area of perforation, that is, the maximum width and the area of a pinhole between the binding holes used in the binding process. This index is measured by mm and the area of perforation is expressed as 3mm * 8mm.
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