Deep hinged square tin box shows quality strength with precise data, based on the core needs of deep cavity storage, convenient opening and closing, and long-term durability. It quantifies core dimensions such as materials, size, performance and craftsmanship into specific data. Every set of data has undergone strict testing and scientific calculation, truly presenting product advantages and breaking the pain points of vague data and uneven quality of ordinary square metal boxes. From material specifications, dimensional accuracy to hinge performance and sealing effect, it speaks with data in an all-round way, making product quality visible and quantifiable. It is suitable for food storage, home storage, supermarket display, gift customization and other multi-scenarios. It not only meets the needs of deep-capacity storage, but also brings a more worry-free and assured user experience with high quality supported by precise data. Every set of data shows ingenuity and strength.

　　Material Data: Safe and durable, data traceable. The can body is made of food-grade tinplate, with the plate thickness accurately controlled between 0.26-0.32mm, 35% thicker than ordinary square metal boxes. The material purity is as high as 99.7%, lead-free and free of harmful heavy metals, complying with GB 4806.9-2016 standard for metal materials and products in contact with food. The heavy metal content is ≤0.001mg/kg, which can be directly in contact with various foods without potential safety hazards; the thickness of the environmental protection epoxy polyester coating inside and outside the can body is 9-11μm, the adhesion is ≥level 4, the scratch resistance times are ≥500 times, not easy to fade or peel off, the temperature resistance range is -25℃ to 125℃, and the moisture-proof performance is excellent. It can be stored in an environment with 85% humidity for 72 hours without rust or deformation; the thickness of the non-slip rubber pad at the bottom of the can is 3.0-3.5mm, and the friction coefficient is ≥0.6, which effectively prevents the can body from sliding and buffers the impact force of collision up to more than 1500N.

　　Size Data: Precise and regular, strong adaptability. The overall shape is a standard square. The conventional size: 18cm×18cm×10cm, the mini size: 14cm×14cm×8cm, the enlarged size: 22cm×22cm×12cm, the dimensional error ≤±0.08mm, ensuring that each product has a regular shape and uniform size; the depth of the can body is 8-12cm, and the storage capacity is 2520ml (conventional version), 1568ml (mini version) and 5808ml (enlarged version) respectively, which can easily accommodate various large and multiple items, and the storage capacity is 2.5-3 times that of ordinary square metal boxes; the side length of the can mouth is 14-22cm, the crimping width is 0.45-0.55mm, the crimping error ≤±0.03mm, round and smooth without burrs, safer to use; the hinge installation position deviation ≤0.1mm, ensuring smooth opening and closing without jamming.

　　Hinge Performance Data: Sturdy and durable, smooth opening and closing. Equipped with high-quality metal hinges, the hinge thickness is 0.38-0.42mm, the material tensile strength is ≥500MPa, and the toughness is excellent. It can realize 180° precise opening and closing, the number of opening and closing times can reach more than 120,000 times, and there is no looseness or breakage after long-term frequent opening and closing; the hinge opening and closing torque is controlled at 0.8-1.2N·m, opening and closing without jamming or abnormal noise, which can be easily operated by the elderly and children; the thickness of the anti-oxidation coating on the hinge surface is 2.2-2.6μm. After 48 hours of neutral salt spray test, the surface has no rust or discoloration, and the anti-oxidation performance is outstanding. It is suitable for use in various environments such as humidity and dryness, and the service life is more than 8 years.

　　Sealing and Process Data: Long-term protection, outstanding quality. Equipped with food-grade silicone sealing ring, the thickness of the rubber ring is 2.8-3.2mm, the elongation rate is ≥300%. The sealing test data shows that the sealing pressure is ≥0.35MPa, the leakage rate is ≤0.008ml/min, no liquid or powder leakage after 24 hours of inversion, effectively isolating air, moisture and dust, and the shelf life of food storage can be extended by more than 30%; adopting CNC stamping forming technology, the stamping pressure is 90-110MPa, the stamping accuracy is ≤0.02mm, the flatness of the can body is ≤0.03mm, no wrinkles or depressions; the surface polishing process adopts four times of finishing polishing, the polishing speed is 1300-1600r/min, the surface roughness Ra ≤0.6μm, the touch is delicate and smooth, without any defects. Every set of process data ensures stable and outstanding product quality.