Maybe you find that kraft paper bags shrink and expand. That will have a terrible effect on packing. But the cause is not well understood. So what causes the kraft paper boxes expansion and shrinkage? The following Haiying printing factory will give you a specific introduction.
1. Regional differences of kraft paper bag
The environmental characteristics of each place are different. If the origin of bags and printing factories are not the same area. In the process of transportation or storage, temperature and climate will cause the kraft paper bags to expand and shrink.
2. Storage too long
It’s not just food that expires. Paper also has a shelf life. Kraft paper bags will swell and shrink when stored for too long. That means the paper bags are out of date. It cannot be in printed packaging bags.
3. Absorb water and become damp
The paper itself has water absorption. Some stores do not store leftover brown paper bags properly. That causes the brown paper bags to become damp. Wet bags are not as good as new ones. So we must grasp the preservation of kraft paper bags.
4.A mixed batch of different kraft paper
Maybe the amount of kraft paper is not enough. At this condition, some businesses use different brands or batches of paper added for printing. It would cause the phenomenon of kraft paper bags swelling and shrinking.
5. Influence of the printing environment
The temperature of the printing press is also responsible for the swelling and shrinkage of the kraft paper. Pre – and Post-press workshop temperature, environment and printing process, etc.
why us
Haiying printing factory is a professional packaging factory. We order kraft paper in various sizes and thicknesses. We have strong strength and a wide range of products.
Contact us by email gong@huaprinting.com