Changda is an influential stationery box supplier. The tin box set is one of the main products of Changda. During the quality inspection stage, Changda metal stationery box will be checked strictly in all aspects. It has been tested in terms of AZO content, salt spray, stability, aging, VOC and formaldehyde emission, and environmental performance of the furniture. It is totally airtight and not impervious to light. The product has strong material strength. The pipeline of this product has been tested during production and the result proved that it still keeps stable and not subject to crack after 1,000 times of folding. It has been heat-treated for sterility.
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