Extra deep square tin box creates quality with exquisite craftsmanship. From raw material cutting to finished product forming, every process is refined. Relying on advanced production technology and strict quality control standards, the craft details are integrated into every part of the product, which not only ensures the regularity of the extra deep square shape, but also balances practicality and texture, making each metal box both durable and beautiful, showing the strength of ingenuity.

　　Core Craft 1: Precision cutting process, square and regular without deviation. Adopting CNC precision cutting technology, the food-grade metal sheet is accurately cut, with an error controlled within 0.1mm, ensuring that the four sides of the box body are square, the size is accurate, no skew or burrs, laying a solid foundation for subsequent forming; dust and noise reduction treatment is adopted during the cutting process to avoid scratches on the surface of the sheet, retain the original metal texture, and make the edges and corners of the box body neat and neat, improving the overall exquisiteness of the product.

　　Core Craft 2: Integrated stretch forming process, stable deep cavity without collapse. Aiming at the extra deep box body design, professional integrated stretch forming technology is adopted. Through progressive stretching technology, the metal sheet is stretched to the preset depth at one time without splicing. The box body is integrally formed, with a more stable structure and stronger load-bearing capacity, effectively avoiding problems such as loose joints and liquid leakage; the strength and speed are strictly controlled during the stretching process to ensure uniform wall thickness of the box body, no wrinkles or deformation, balancing extra deep capacity and structural stability.

　　Core Craft 3: Fine polishing and crimping process, safe and smooth, more considerate. The box mouth adopts double fine polishing process, first rough grinding to remove burrs, then fine grinding to brighten, combined with crimping process, the edge of the box mouth is folded round, no sharp edges and corners, no scratching hands when taking items, eliminating potential safety hazards; the surface of the box body is polished through multiple processes, with a delicate and smooth touch, reducing metal scratches, and at the same time improving the metal luster, making the product more textured, balancing practicality and safety.

　　Core Craft 4: Environmental protection spraying and sealing process, durable, moisture-proof and longer-lasting. Adopting electrostatic environmental protection spraying technology, the environmental protection coating is evenly attached to the inside and outside of the box body. The coating is delicate and uniform, with strong adhesion, not easy to fade or scratch, and at the same time plays a role in moisture-proof and rust-proof, suitable for storage in humid environments; the box lid and box body adopt precise sealing technology, ensuring close fit through mold calibration, combined with a sealing rubber ring, strengthening the sealing performance, effectively isolating air and moisture, extending the storage period, and every process shows the ultimate pursuit of quality.