Different paper grades mean different quality specifications to meet your end-customer’s goals. For example, fine paper or paper board require uniformity across the web to ensure good printability. If linerboard and liquid packaging contain wrinkles, it’s challenging to print on - color may run or print quality will be poor in addition to the potential leak. Visible dirt in pulp, paper and paperboard leads to its downgrading, as it significantly reduces the quality of end products. Holes, spots, and dirt particles are examples of typical defects, while wrinkles, streaks, and slime spots are examples of subtle and low contrast defects. It’s all a matter of matching the design, print technique, budget, deadline, intended use and customer expectations to the right quality measurements and control.