The hinged rectangular cookie tin box is a mainstream high-end storage packaging in the baking food industry, featuring integrated hinge opening and closing, long-term sealing and fresh-keeping, and regular rectangular appearance. It is widely suitable for packaging various baked goods such as cookies, handmade pastries and crisp snacks. Different from ordinary split tin boxes and simple food packaging boxes, cookie tin boxes have extremely high process requirements for food-grade safety, structural tightness, compression and shatter resistance, and appearance flatness. Optimized professionally for the storage characteristics of baked food, every procedure of the product, including base material selection, precision forming, integrated hinge forging, sealing technology, surface finishing and factory quality inspection, adopts refined industrial manufacturing technology. It creates high-quality packaging suitable for high-end baking brands with strict craftsmanship, balancing practicality, aesthetics and food storage safety.

　　The food-grade base material selection technology is the core foundation to ensure cookie storage safety. Aiming at the characteristics of baked food such as high oil content, easy moisture absorption and oxidation, all box bodies are made of first-class food-certified special tinplate, eliminating recycled miscellaneous materials and inferior thin plates, and adopting unified 0.22mm thickened national standard plates. Specially treated with anti-rust and anti-oxidation technology, the plate surface is dense and uniform, which can effectively isolate grease corrosion and air oxidation, and avoid problems such as rusting, chipping and metal precipitation of tin boxes during long-term storage of pastries. After entering the factory, raw materials undergo three-level screening, including hardness test, flatness detection, anti-corrosion performance verification and thickness deviation detection, to completely eliminate defective plates with warpage, uneven thickness and surface impurities. Meanwhile, the base material is pretreated with degreasing, dust removal and passivation to remove surface oil stains and oxide layers, enhancing the adhesion of subsequent coating and printing processes and meeting the safety standards of high-end food packaging.

　　Integrated forming and hinge forging technology is the core technological highlight of this product. Traditional cookie tin boxes mostly adopt split welding and assembly technology, which is prone to technological defects such as excessive gaps, loose hinges, unsmooth opening and closing, and rusted and falling off welding points. Adopting fully automatic CNC integrated stamping and bending technology, our factory integrates the rectangular box body, box cover and hinge structure into one piece without welding, splicing or rivet fixing, completely avoiding the technological drawbacks of split structures. With high-precision die calibration, the length-width ratio and flatness of the rectangular box body are strictly controlled. The box corners adopt arc passivation stamping technology with smooth and burr-free polishing, which not only improves the holding feel but also prevents scratches from sharp corners. The hinge is shaped by multiple forging and bending processes to enhance its toughness and bearing capacity. It features uniform opening and closing damping, remaining loose-free, fracture-free and deformation-free after tens of thousands of opening and closing times, perfectly adapting to long-term repeated use and storage scenarios.

　　The special sealing and fresh-keeping technology is customized for the characteristics of cookie food, effectively solving industry pain points such as dampness, loss of crispness, flavor mixing and deterioration of pastries. The inner side of the box cover is equipped with food-grade elastic sealing rubber rings fixed by embedded high-pressure fitting technology, which precisely matches and fits seamlessly with the box body clamping groove. A closed dust-proof and moisture-proof space is formed after closing, which can effectively block the invasion of external water vapor, oxygen, dust and peculiar smells, firmly lock the crisp taste and pure flavor of cookies, and greatly extend the normal temperature storage period of baked goods. Compared with ordinary non-sealed tin boxes, the sealing structure made by this technology has more stable sealing performance without air leakage and gaps, adapting to multiple scenarios such as supermarket display, household storage, long-distance transportation and gift giving, and protecting cookie quality in all aspects.

　　The surface finishing and environmentally friendly printing technology balance texture and safety. The tin box surface is finely processed in a dust-free workshop, supporting multiple processes such as matte frosted finishing, bright baking varnish, anti-slip film coating, embossing, CMYK full-color printing and spot color customization. All inks, baking varnishes and coatings are food-grade environmentally friendly materials, lead-free, odorless, non-toxic and harmless, fully complying with domestic and EU food packaging safety standards. Operations are completed in a constant-temperature and constant-humidity dust-free workshop to avoid process defects such as paint particles, printing color difference, surface blistering and paint peeling. The finished product has a smooth and delicate surface, uniform color and high-grade texture. Customization of brand LOGO, patterns and texts is supported with high printing clarity and strong adhesion. It is wear-resistant and scratch-resistant, without fading and delamination after long-term storage, effectively improving the terminal shelf recognition and brand grade of products.

　　Finally, the finished products pass strict all-round quality inspection technology to build a solid quality line. Each finished product is inspected item by item for box squareness, surface flatness, paint integrity, hinge opening and closing fluency, sealing tightness and compression and drop resistance. Defective products with deformation, flaws, abnormal opening and closing and poor sealing are 100% eliminated. After cleaning and dust removal, finished products are packaged with double-layer protection of pearl cotton and compression-resistant cartons to avoid collision and wear during transportation. The complete set of standardized and refined process system ensures stable quality and superior performance of each batch of hinged rectangular cookie tin boxes, providing an integrated packaging solution with safety, durability, beauty and long-term fresh-keeping performance for high-end baked food.