Cartons are commonly used with three layers and five layers, and seven layers are used less frequently. Each layer is divided into lining paper, corrugated paper, core paper, and face paper. The lining paper and face paper include tea board paper, kraft paper, and corrugated paper for the core paper. The color and feel of various papers are different, and the paper (color and feel) produced by different manufacturers are also different.
Cartons are usually used as a wrap for goods or an outer layer of article protection.
The cartons usually have a variety of patterns or text such as "handle with care", "afraid of moisture", "upward", "stacking limit", "afraid of the sun", "moisture-proof", "quality and safety", "no tumbling", "no trampling", "pay attention to fire", "easy to use", “fragile items”, “green environment”, “fear of heat”, “food”, “anti-odor” to remind users to pay attention and protect the items from harm.
As an indispensable part of modern logistics, packaging cartons bear the important responsibility of containing, protecting products and beauty.
The physical performance indicators of the packaging carton become the basis for its quality assessment, and the accuracy and reliability of the test data need to be guaranteed by good testing environmental conditions.