Vintage Texture, Parameters Hide Charm — Antique Tin Lunch Box, with "vintage reproduction, high-quality tin products, practical and durable" as its core positioning, based on diverse needs such as vintage collection, daily use, gift giving and scene decoration, balancing vintage appearance and practical performance, accurately controlling every core parameter, restoring the texture and style of classic vintage tinware, creating a vintage tin lunch box with compliant parameters, outstanding texture and adaptability to diverse scenarios. It is suitable for vintage enthusiasts, collectors, people pursuing a delicate life and various vintage scene decorations. It not only meets the demand for vintage aesthetics, but also fits the practical needs of daily lunch storage and outdoor picnics, becoming a preferred product with both appearance and practicality in the field of vintage tinware. We adhere to the core concept of "vintage without compromise, parameters cast quality", strictly follow the traditional tinware production standards, combined with modern process specifications. From material, size, structure to safety and durability, every parameter has been accurately calculated and repeatedly polished, not only restoring the classic texture of vintage tinware, but also ensuring the convenience and safety of modern use, perfectly integrating vintage charm with practical performance, and showing the aesthetics of vintage life.

　　Core Size Parameters: Reproduce Classics, Adapt to Diverse Scenarios. Combined with the classic version of traditional vintage tin lunch boxes, balancing vintage texture and practical storage needs, scientifically set size parameters with an error of ±0.15cm, ensuring that each product can restore the vintage charm, and at the same time adapt to daily use and collection display. The overall size is divided into three classic versions, accurately matching different needs: Classic Vintage Version (suitable for daily use + light collection): 20cm in length × 12cm in width × 6cm in height, overall weight 380-420g, capacity about 1440ml, suitable for single-person lunch storage, can be easily put into backpacks and handbags, balancing portability and vintage texture, reproducing the classic proportion of traditional tin lunch boxes, with corners reproducing the vintage rounded version, restoring the simple style of old tinware; Collection Reproduction Version (suitable for vintage collection + decoration): 22cm in length × 13cm in width × 6.5cm in height, weight 450-480g, capacity about 1858ml, the version reproduces the classic tin lunch box of the Republic of China period, with accurate size proportion reproduction, and details reproducing the lines and version of traditional tinware, suitable for collection display and vintage scene decoration, showing collection value; Mini Vintage Version (suitable for portable carrying + decoration): 16cm in length × 10cm in width × 5cm in height, weight 300-320g, capacity about 800ml, small and exquisite, reproducing the version of old children's tin lunch boxes, suitable for short-distance carrying and snack storage, and can also be used as a vintage ornament, suitable for desktop and window decoration scenarios. In addition, the lid thickness is 0.4cm, the box body thickness is 0.35cm, and the bottom thickness is 0.45cm. The traditional tinware thickening process is adopted to balance texture and stability. The corner radius is 0.8cm, reproducing the rounded polishing process of traditional tinware, which not only has a vintage texture, but also avoids sharp corners, adapting to the safety needs of daily use.

　　Material Parameters: High-Quality Tin, Balancing Vintage and Durability. Select high-quality vintage tin materials, strictly control material parameters, follow traditional tinware production standards, and at the same time meet modern food contact safety standards, balancing vintage texture, durability and safety. All materials meet the national food contact metal material standard (GB 4806.9-2016) and the EU food contact material safety standard (EC 1935/2004), with no harmful residues and no odor, suitable for long-term use and collection. The main body of the box is made of high-purity tin alloy material, with a tin content of ≥99.3%, material density of 7.28g/cm³, tensile strength of ≥15MPa, flexural strength of ≥28MPa, and Shore hardness of 55-65 degrees. It has good ductility and wear resistance, reproduces the warm texture of traditional tinware, has a delicate touch, is not easy to deform or break, can withstand daily collisions and extrusions, has a service life of ≥36 months, and can form a natural patina after long-term use, showing vintage charm; It also has good moisture-proof and anti-oxidation performance, which can effectively isolate air and moisture, protect the food inside the box from dampness and flavor mixing, and adapt to the storage needs of lunch, snacks and other ingredients. The box lid is made of the same tin alloy, with a thickness of 0.4cm and a compressive strength of ≥20MPa, not easy to dent, reproducing the closing version of traditional tinware, with tight closing, balancing sealing and vintage texture. The internal partition is made of food-grade tin alloy material, with a thickness of 0.3cm, which can be freely disassembled. The height of the partition is 4.5cm, which can flexibly divide the storage space to adapt to the classified storage of staple food, dishes and soup. The partition load-bearing is ≥800g, not easy to bend or break, and fits the overall vintage tone. In addition, the vintage lines on the box body adopt traditional chiseling technology without additional ink printing, avoiding harmful volatile substances, balancing vintage texture and use safety. At the same time, the tin material can be 100% recycled, environmentally friendly and durable, conforming to the modern green life concept and inheriting the environmental value of traditional tinware.

　　Structural Parameters: Reproduce Classics, Convenient, Practical and Textured. Relying on the classic structure of traditional vintage tin lunch boxes, combined with modern usage habits, optimize structural parameters, create a design of "vintage version + practical structure". Every structural parameter balances vintage charm and convenience, restores the structural beauty of traditional tinware, and improves modern use experience. The opening and closing structure adopts a traditional buckle design, reproducing the buckle version of old tinware, with a buckle thickness of 0.3cm, a width of 2cm, and a load-bearing of ≥1500g, opening and closing smoothly. It not only retains the vintage opening and closing feel, but also ensures tight closing, with a gap of ≤0.12cm after closing, which can effectively prevent soup leakage, adapting to daily carrying and outdoor use; The surface of the buckle adopts traditional polishing technology without redundant decoration, with a warm touch, fitting the vintage tone, and avoiding slipping when opening and closing, improving the convenience of use. Internal structural parameters: The classic vintage version is equipped with 1 main storage compartment + 1 small soup compartment, the main storage compartment size is 19cm×11cm×5.5cm, and the soup compartment size is 8cm×6cm×5cm, which can classify and store staple food and soup to avoid flavor mixing; The collection reproduction version is equipped with 1 main storage compartment + 1 small storage grid + 1 tableware compartment, the main storage compartment size is 21cm×12cm×6cm, the small storage grid size is 6cm×5cm×5.5cm, and the tableware compartment can place supporting vintage tin tableware, balancing storage practicality and vintage integrity; The mini vintage version is equipped with 1 main storage compartment, size 15cm×9cm×4.5cm, suitable for small food storage, simple and practical. The bottom structure adopts a vintage anti-slip design, with 4 silica gel anti-slip pads, the diameter of the anti-slip pad is 1.2cm, the thickness is 0.25cm, Shore hardness 50-60 degrees, anti-slip coefficient ≥0.45, which can effectively prevent the lunch box from sliding on the desktop, avoid falling and damage, and at the same time not damage the overall vintage version; The bottom reproduces the embossing process of traditional tinware, which increases the texture and improves the wear resistance of the bottom, adapting to daily placement and carrying.

　　Safety Parameters: Strictly Up to Standard, Protecting Use Safety. Focusing on daily use and collection needs, strictly standardize various safety parameters. All safety parameters meet modern food contact safety standards, and at the same time follow the safety production specifications of traditional tinware, comprehensively ensuring use safety, eliminating potential safety hazards, and balancing practicality and collectibility. Material safety parameters: No odor (odor level ≤1), no harmful volatile substances, no excessive heavy metals, lead content ≤0.001mg/kg, cadmium content ≤0.0005mg/kg. The tin material itself is non-toxic and harmless, meets food contact safety standards, and is harmless to human body when in long-term contact with food, so it can be used with confidence; The tin alloy is treated with chrome-free passivation, no harmful residues, avoiding harmful substances generated during oxidation, and at the same time protecting the surface texture of the tinware and extending its service life. Corner safety parameters: All corners are polished through 6 traditional refined polishing processes, with a polishing accuracy of ≤0.01mm, a corner radius of 0.8cm, no burrs, no sharp corners, smooth and warm surface, fitting the polishing standard of traditional tinware, which can effectively avoid scratching hands, adapting to the safety needs of daily use. Temperature resistance safety parameters: The material temperature resistance range is -5℃-70℃, which can adapt to daily indoor and outdoor temperature changes, avoid high-temperature deformation and low-temperature brittleness, and adapt to use in different environments; It also has good impact resistance, no damage or deformation when dropped from a height of 1.5m, can withstand daily dropping and collision, eliminate the potential safety hazard of sharp corners after damage, and protect the vintage version from damage. Load-bearing safety parameters: The overall load-bearing of the box body is ≥8kg, the lid load-bearing is ≥3kg, the partition load-bearing is ≥800g, and the buckle load-bearing is ≥1500g, which can withstand daily extrusion and stacking, not easy to deform or dent, ensuring the safety and durability of the product during use, and at the same time protecting the vintage texture from damage.

　　Durability and Adaptability Parameters: Long-Term Durable, Adapting to Diverse Scenarios. Balancing vintage collection and daily use, set reasonable durability parameters to ensure that the product can be used and collected for a long time, and at the same time adapt to diverse scenarios, improving product practicality and adaptability, inheriting the durable characteristics of traditional tinware. Durability parameters: Service life ≥36 months, under normal use, the box body is free of damage, deformation and obvious oxidation marks, and can form a natural patina after long-term use, improving the vintage texture; The number of opening and closing times is ≥2000, the buckle is free of looseness and breakage, and the opening and closing are smooth, retaining the vintage opening and closing feel; The number of friction resistance times is ≥800, the surface has no obvious scratches, can withstand daily friction use, and the wear resistance of the tin material can ensure that the vintage lines are clear for a long time; Waterproof performance: No water seepage after soaking for 60 minutes, which can effectively prevent rainwater and water stains from seeping in, protect the food inside the box from dampness, and adapt to outdoor picnics, short-distance trips and other scenarios. Adaptability parameters: Suitable for vintage enthusiasts, collectors and people pursuing a delicate life, covering diverse scenarios such as daily lunch storage, outdoor picnics, vintage collection, scene decoration and gift giving; It can store various ingredients such as staple food, dishes, soup and snacks, adapting to the light use needs of single and double people; Suitable for vintage scene decoration, can be used as a vintage ornament and window display, showing vintage style; Suitable for bulk purchase scenarios, the minimum order quantity for bulk purchase is ≥30 pieces, which can adapt to the bulk purchase needs of vintage cultural and creative stores, gift stores, training institutions, etc. The size error of bulk purchase is ≤±0.15cm, ensuring product consistency. In addition, the product can withstand daily cleaning, can be directly wiped with a soft cloth, no residue and no scratches after wiping, avoiding damage to the surface texture of the tinware with hard cleaning tools, adapting to daily cleaning needs, balancing practicality and collectibility.

　　Additional Parameters: Details Hide Charm, Improve Vintage Experience. In addition to the core parameters, optimize various additional parameters, balancing vintage texture and detailed experience, restoring the classic details of traditional tinware, making the product more vintage charm and collection value, and improving modern use comfort. Vintage pattern parameters: The box body adopts traditional chiseling technology, the pattern depth is 0.1-0.15cm, the pattern is clear, no blurring, no falling off, reproducing the classic patterns of traditional tinware (such as tangled branch patterns, meander patterns, simple plain surfaces), the chiseling accuracy is ≥300dpi, balancing vintage texture and craft beauty. The pattern of each product is carefully polished by hand, showing ingenuity; The plain surface is treated with matte frosting, with soft luster and no dazzling reflection, fitting the vintage tone, and avoiding fingerprint residue, easy to clean. Weight parameters: The overall weight is controlled at 300-480g, balancing vintage texture and portability, not only retaining the heavy texture of tinware, but also not increasing the carrying burden, with uniform weight distribution, avoiding tilting and slipping when carrying. Dimensional tolerance: All dimensional tolerances are ≤±0.15cm, ensuring that the size of each product is uniform, reproducing the classic version, adapting to bulk purchase and collection display, and avoiding inconvenience in storage and uncoordinated placement caused by dimensional deviation. Supporting parameters: The collection reproduction version is equipped with vintage tin tableware (1 spoon + 1 fork), the tableware material is the same as the box body, the tin content is ≥99.3%, the size is suitable for lunch box storage, balancing practicality and vintage integrity; All versions are equipped with a vintage linen storage bag, which is convenient for carrying and collection, protects the surface of the tinware, and avoids oxidation and collision.