Carton or hard paper case: It is the most widely used packaging product. Depending on the material used, there are corrugated cardboard boxes, single-layer cardboard boxes, etc., with various specifications and models.

The commonly used cardboard boxes have three layers, five layers, and seven layers are less commonly used. Each layer is divided into inner paper, corrugated paper, core paper, and surface paper. The inner and surface papers include tea board paper and kraft paper, while the core paper uses corrugated paper. The colors and textures of various papers are different, and the papers produced by different manufacturers also have different colors and textures.

Usually used as a wrapping or protective outer layer for goods. The volume of the cardboard box varies depending on the size of the product. The cardboard box usually has various patterns or text prompts such as "Handle with Care", "Be Afraid of Moisture", "Upward", "Stacking Limit", "Afraid of Sunlight", "Moisture", "Quality and Safety", "Do Not Roll Over", "Do Not Tread", "Fire Prevention", "Fragile Items", "Green Environment", "Afraid of Heat", "Food", "Odor Prevention", etc., to remind users to pay attention and protect the contents from harm. As an indispensable part of modern logistics, packaging cardboard boxes bear important responsibilities for packaging, product protection, and aesthetics. The physical performance indicators of packaging cardboard boxes become the basis for their quality evaluation, and the accuracy and reliability of test data require good testing environmental conditions to ensure.