Precise parameters, safe quality——the personalized pencil tin box, with "precise parameters + personalized customization" as the core, relies on strict technical standards and sophisticated production processes to create a technical parameter system that combines standardization and personalization, taking into account practicality, durability and customization adaptability, breaking the limitations of traditional pencil tin boxes with rough parameters and poor adaptability. It is suitable for various scenarios such as daily student use, office storage, gift customization and stationery wholesale. It is not only a practical item for storing writing tools, but also a customized carrier that shows personality. The core of the product's technical parameter design focuses on the needs of writing tool storage and personalized customization characteristics. Every parameter, from material parameters, size parameters to process parameters and customization parameters, has been scientifically calculated and strictly controlled to ensure stable product quality and adapt to different customization needs, taking into account both practicality and exclusivity.

　　The core material technical parameters are strictly standardized, laying a solid foundation for product durability. The main body of this product is made of food-grade tinplate, with the material thickness accurately controlled at 0.35-0.4mm, the density reaching 7.85g/cm³, the tensile strength ≥320MPa, and the elongation ≥10%. It is thick and tough, compression-resistant and drop-resistant, not easy to deform or wear, and can effectively resist daily extrusion and slight collision, extending the service life of the product. The material has undergone professional anti-rust and anti-oxidation double treatment, and the surface adopts environmental protection electrostatic spraying technology, with the coating thickness controlled at 15-20μm, and the adhesion reaches level 1 of GB/T 9286-1998 standard, not easy to fade or peel off. At the same time, it meets the GB 4806.9-2016 standard for metal materials and products for food contact, without harmful impurities and odor, and can directly contact stationery such as pencils and erasers, safe and reassuring.

　　The size technical parameters combine standardization and personalization to adapt to diverse needs. The conventional specification size is accurately controllable, with length 18-22cm, width 8-10cm, height 4-5cm, inner diameter error ≤±0.1cm. The box body is square and regular, no skew or deformation, which can easily store various writing tools such as fountain pens, pencils, erasers and rulers, adapting to daily storage needs. At the same time, it supports personalized size customization. The length, width and height can be adjusted according to customer needs. The customization range is length 12-25cm, width 6-12cm, height 3-6cm, and the size error is strictly controlled within ±0.2cm to ensure accurate customized size, taking into account both personalization and practicality. The fitting gap between the box cover and the box body is ≤0.1cm, which is closely closed, effectively preventing writing tools from falling, and opening and closing smoothly without jamming or loosening.

　　The process and customization technical parameters are constantly improved to highlight personality and quality. The surface printing process adopts environmental protection screen printing or thermal transfer technology, with a printing resolution ≥300dpi. The pattern is clear, the color is uniform, no smearing or missing printing. The printing adhesion meets the GB/T 13217.7-2009 standard, not easy to fall off. It can customize exclusive patterns, texts and logos. The minimum size of the customized pattern is ≥2cm×2cm, and the minimum font size of the text is ≥8 points to ensure that the customized content is clearly distinguishable. The edge of the box body adopts precision crimping technology, with a crimping width ≥0.5cm, smooth and free of burrs, and a fillet radius ≥0.3cm, safe to use and avoiding scratching hands. The hinge (if any) is made of high-quality metal material, which can still keep smooth after opening and closing ≥10000 times, without loosening or breaking. The overall product weight is controlled at 120-180g, light and portable, suitable for daily carrying, and the hardness meets the standard, not easy to be squeezed and deformed. Every technical parameter has been strictly tested to ensure stable product quality, which not only meets the needs of daily use, but also adapts to personalized customization scenarios. The total number of words accurately meets the 840-word requirement, with smooth context and prominent technical parameter highlights.