Quality Standard
Technical documentation defined by a paper manufacturer establishes the guaranteed physical, optical, and structural limits of a specific grade of paperboard. A mill specification outlines the target values and acceptable tolerances for major properties such as basis weight, caliper, moisture content, and brightness. This document forms the basis of the purchasing agreement between the converter and the paper mill.
It ensures that the incoming material will perform consistently on high-speed printing and folding equipment.
Technical Tolerance
Specific metrics listed in this document govern the physical behavior of the board during converting. These parameters include cross-direction stiffness, surface roughness, internal bond strength, and moisture-barrier properties for polymer-coated grades. The mill specification provides the baseline that converter quality control teams use to accept or reject arriving shipments.
Without these predefined tolerances, predicting how the board will respond to folding and gluing forces is impossible.
Procurement Role
Sourcing departments rely on these technical limits to compare different suppliers and ensure product compatibility. When ordering material for a print run, the buyer must ensure that the mill specification matches the physical requirements of the printing press and the filling line. This verification minimizes the risk of runnability issues or structural failure in the finished packaging.
