Packaging materials and product testing can be divided into the following parts according to the type of material:&Nbsp; Testing of packaging materials for paper products&Nbsp; Testing of paper, cardboard, and other paper materials and products. Paper materials and products are the most widely used varieties in production and daily life, and the quality of paper directly affects the quality of products. The testing of packaging materials for paper products includes several major categories of performance, including printing performance, mechanical performance, and weather resistance. Common quality issues with packaging materials for paper products include: the printing and mechanical properties of paper products do not meet product standards and usage requirements; Damage caused by poor weather resistance; Paper products release harmful substances, causing pollution or damage to the product&Nbsp&Nbsp&Nbsp; Testing of plastic packaging materials and products. Plastic packaging is also an important type of packaging used in our daily lives, second only to paper. The testing items of plastic packaging materials mainly include: mechanical properties (stretching, tearing, puncture, etc.), barrier properties (moisture resistance, oxygen resistance, etc.), weather resistance, optical properties, anti-static performance, foam material buffering performance, etc&Nbsp&Nbsp; Common quality issues with plastic packaging materials include: insufficient mechanical and barrier properties; Discoloration, brittleness, melting, adhesion, cracking, and other phenomena occur during the weather resistance test; The transmittance and ultraviolet transmittance do not meet the standards; Abnormal values of surface resistance during testing in specified environments, poor buffering performance of materials, etc&Nbsp&Nbsp; Wood packaging material testing&Nbsp; The testing of wooden packaging materials refers to the testing of wooden materials such as wood and artificial board products used for supporting, protecting, or transporting goods. The main testing items for wooden packaging materials include: static bending strength, bending strength, bonding strength, nail grip strength, moisture content, formaldehyde release, weather resistance, etc&Nbsp; Common quality issues with wooden packaging materials include: board breakage; Rusting of products caused by high moisture content of wood; Formaldehyde release and harmful gas release&Nbsp; Composite packaging material testing&Nbsp; Composite packaging material testing is a composite material that combines two or more materials through one or more composite processes to form a certain function. The testing items of composite packaging materials mainly include: barrier performance, mechanical performance, weather resistance, light resistance, anti-static performance, etc&Nbsp&Nbsp; Common quality issues with composite packaging materials include: barrier performance (moisture and oxygen permeability) and mechanical properties not meeting the standards; Aluminum foil bags and aluminum plated bags have poor light resistance; Electrical properties such as surface resistance are not up to standard&Nbsp&Nbsp; Food Packaging Testing&Nbsp; Food packaging has the function of protecting food, preventing damage from external factors such as biology, chemistry, and physics during the circulation process, and maintaining the stable quality of the food itself. It not only facilitates the consumption of food, but also has the function of expressing the appearance of the food, attracting consumption, and enhancing product value. Common food packaging materials include paper, plastic, wood, glass, metal, etc&Nbsp&Nbsp; The food packaging testing items mainly include: protective performance (physical performance is the same as the testing performance of various materials mentioned above), food safety performance (chemical performance (hygiene performance, heavy metals, harmful substances (plastic additives, coatings, solvents, etc.), microorganisms, etc.)&Nbsp&Nbsp