This large sliding lid pencil tin is developed with strict control of harmful chemical substances and pure and safe performance as the core standard. Tailored for students’ long-term close use, it eliminates the addition and precipitation of all kinds of harmful chemical substances throughout the whole process from raw material selection, surface coating and bonding technology to overall molding, thoroughly solving the common safety pain points of ordinary pencil boxes on the market such as chemical residues, harmful substance volatilization and chemical pollution. Most low-cost pencil boxes on the market adopt cheap chemical raw materials, inferior paint glue and recycled materials to reduce costs, containing many hidden harmful chemical substances such as formaldehyde, benzene series, heavy metals and plasticizers. Carried in schoolbags and touched frequently by students for years, these harmful substances will volatilize and penetrate slowly, causing potential damage to skin and respiratory health after long-term accumulation. Adhering to strict chemical safety standards, this pencil tin realizes zero harmful chemical substances, zero odor volatilization and zero toxin precipitation, creating pure and safe learning storage supplies for children.

　　In terms of the chemical safety of core materials, this product abandons recycled iron, inferior alloys, recycled plastics and other raw materials with impurity chemical residues, and selects high-purity original food-grade tinplate base materials. The material itself has no chemical additives, no heavy metal harmful substances such as lead, mercury, cadmium and chromium, no chemical residues and no impurity pollution. The original metal base material has extremely stable physical and chemical properties, and will not react with air, hand sweat and stationery ink, nor oxidize to produce toxic substances, eliminating hidden chemical safety hazards from the material source. Different from ordinary pencil boxes that have trace chemical residues and secondary pollution from recycled materials, this pencil tin is processed with multiple purification technologies to completely remove hidden harmful chemical components in raw materials. With pure and safe materials, it will not decompose or volatilize toxic chemical substances even after long-term closed storage and high-temperature placement, suitable for students’ all-weather, all-season and high-frequency close use.

　　The surface coating is a key link to eliminate chemical hazards. Abandoning industrial spray paint and inferior chemical coatings commonly used in cheap pencil boxes, this product adopts food-grade environmentally friendly and non-toxic protective coating with zero formaldehyde, zero benzene series and zero irritating chemical additives. The coating is formed by high-temperature curing and firmly attached to the tin body with strong stability, avoiding chemical pollution risks caused by coating decomposition, falling off and volatilization. The industrial coatings of ordinary pencil boxes contain a large number of volatile organic compounds with strong pungent peculiar smell, which continuously release harmful gases and endanger children’s health during long-term use. In contrast, the coating of this product has zero chemical volatilization and zero pungent odor, and can be used directly after unboxing without ventilation. Meanwhile, the coating has excellent acid and alkali resistance and corrosion resistance, and will not chemically react with stationery ink, sweat and water vapor to avoid secondary chemical pollution, maintaining a clean and safe use state for a long time.

　　Zero chemical auxiliary materials in the overall process further upgrade the safety level. Traditional sliding lid pencil boxes mostly use industrial glue and chemical adhesives for assembly, which are rich in harmful chemical substances and will continuously volatilize in a closed environment, causing invisible health hazards. This large sliding lid pencil tin adopts an integrated molding process without splicing, bonding and chemical glue fixation, and is formed by full physical processing, completely eliminating chemical residues and volatilization caused by adhesives and glue. The sliding track and tin body structure are all polished physically with pure metal, without any chemical accessories and chemical auxiliary materials, achieving zero addition, zero residue and zero volatilization of harmful chemical substances from the processing technology. Meanwhile, the product has passed authoritative third-party chemical testing, with all harmful chemical substance test results undetected, fully complying with national student stationery safety standards and food-grade contact safety standards.

　　In addition, this product has no chemical peculiar smell and no allergenic ingredients, gently adapting to children’s delicate skin and sensitive constitution. The chemical raw materials and inferior coatings of ordinary pencil boxes are easy to cause skin allergies and respiratory discomfort, bringing potential hazards with long-term use. Made of full physical technology, this metal pencil tin has no chemical stimulation and invisible hazards. The large-capacity inner cavity can store all kinds of stationery. The smooth inner wall does not absorb stains or breed chemical bacteria, and is easy to clean and scrub without chemical reaction residues after wiping. It resists high-temperature sultry environment in summer and closed storage in schoolbags, and will not accelerate the volatilization of chemical substances due to temperature rise with stable safety performance all the time. With extreme chemical substance control standards, it fully protects students’ learning health and serves as a truly safe storage stationery suitable for children’s long-term close use.