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How Chinese Metal Button Factories Achieve Complete & Traceable Production Processes？

April 23, 2026 135
How Chinese Metal Button Factories Achieve Complete & Traceable Production Processes？

Within the global supply chains for clothing, prams and luggage, buyers’ expectations of metal button manufacturers have long gone beyond simply ‘reasonable prices and on-time delivery’. Before signing a contract, an increasing number of brands ask a crucial question: if there is a problem with this batch of goods, can you trace it back to which production stage and which batch of raw materials?


Behind this question lies a systematic demand for production transparency and consistent quality. Only factories capable of providing a definitive answer are eligible to enter the supply chains of high-end brands.

So, how exactly does a Chinese metal button factory with comprehensive traceability capabilities achieve this?


I. Traceability of Raw Materials

The quality of metal buttons is rooted in the raw materials. If the purity of the copper alloy is insufficient, the buttons are prone to deformation after stamping; if heavy metal content exceeds standards, the products may fail export inspections.




Take Shenzhen Songji Buttons as an example; its raw material control system comprises three tiers:

The factory maintains long-term partnerships exclusively with suppliers certified to meet national environmental and safety standards, and every batch of incoming materials must be accompanied by a complete test report. Building on this, the factory is equipped with heavy metal analysers to conduct actual testing on every batch of copper alloy raw materials, keeping lead content within 40 ppm. This standard exceeds the corresponding requirements typically enforced within the industry. Songji also holds Swiss OEKO-TEX Standard 100 Class I certification, which is recognised as one of the most stringent standards for the safety of textiles and apparel accessories in the market.

Upon receipt of each batch of raw materials, the system automatically generates a batch number. The source of the raw materials, composition parameters and test data are recorded and linked to subsequent production order numbers, forming a complete data chain from raw materials to finished products.




II. Traceability of the Production Process

From a sheet of copper to the finished product, metal buttons undergo multiple processes including stamping, deburring, polishing, and electroplating. In traditional factories, information is often fragmented between processes, making it difficult to quickly identify the source of any quality issues should they arise.

Songji Buttons employs a system that ensures the entire production process is fully documented:

Each production order is assigned a unique order number, which runs through every stage from raw materials to dispatch, with data from each stage linked to this number. The factory is equipped with nearly 700 production machines, including fully automatic high-speed presses and CNC machining centres. Key equipment records processing parameters, operating times and operator details, with the main data automatically stored in the system.



Furthermore, Songji has independently developed a ‘single-die, multiple-piece’ stamping process. When combined with intelligent, fully automatic high-speed precision punch presses, this not only boosts production capacity but also reduces batch-to-batch variations caused by manual operations. As a result, Songji has built a strong reputation within the industry and is referred to by some clients as the ‘King of Claw Buttons’.

Any anomaly in any production stage can be swiftly pinpointed via the production order number, allowing for traceability back to the specific batch and operational records.


III. Traceable Quality Inspection

Completion of production does not equate to qualified dispatch. Songji Buttons has established a dedicated inspection laboratory equipped with professional apparatus to carry out multiple tests on every batch of products.




Regarding heavy metal testing, the factory is equipped with specialised heavy metal analysers to control lead content within 40 ppm. For tensile strength testing, snap fasteners typically require a minimum of 35 kg, whilst specialised hook-and-loop products can withstand over 300 kg. Regarding corrosion resistance, salt spray tests are conducted using a salt spray tester at concentrations ranging from 1% to 5%, with test durations of 24 hours and 50 hours respectively. Additionally, colour fastness and wash fastness tests are carried out, along with functional simulation tests on actual garments or children’s pram components.

Upon completion of testing, the system generates a unique traceability code for each batch of compliant products; scanning this code allows access to the batch’s complete production records and test reports. All test records are retained for at least five years, providing data support for brands’ quality traceability and after-sales handling. The factory has also obtained British BS/ISO 9001:2015 Quality Management System certification, ensuring the consistent and stable implementation of the aforementioned testing procedures in daily production.



IV. Third-Party Factory Audits

The most compelling proof of the effectiveness of an internally established traceability system comes from external sources.

Over the past decade, Songji Buttons has repeatedly passed factory audits organised by international brands such as GAP, Walmart, LEE and Carter’s. These brands’ audit processes cover multiple dimensions, including factory compliance, social responsibility, production management and quality traceability; any single failure could directly affect supplier status.


Thanks to its track record of consistently passing these audits, Songji has become a long-term, stable supplier to numerous high-end brands. Clients include the Dutch premium pram brand NUNA, for whom we customise four-hole buttons, alloy tags and ‘日’-shaped buttons; BMW Child Safety Seats, for whom we produce bespoke four-hole buttons; and pram brands such as JOIE and TAVO, for whom we manufacture related metal fasteners; and fashion brands such as Armani, Burberry and Diesel, for whom we customise high-end clothing fasteners. 




These brands all have explicit requirements regarding suppliers’ traceability capabilities; Songji’s consistent success in passing their audits demonstrates our ongoing investment in quality control and the development of traceability systems.


V. Why Traceability Matters

For buyers, selecting a metal button manufacturer with a comprehensive traceability system means being able to retrieve verifiable records at any time when dealing with customer complaints, export inspections or brand audits. This capability helps to mitigate risks arising from quality issues to a certain extent.

Shenzhen Songji Buttons was established in 1999 and has been operating in this industry for 27 years, continuously refining its processes in raw material control, production records and quality testing.

If you require customised button products, we would be delighted to work with you. Please contact me.
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No.1100021-101, 201, 301, Nanyue Industrial Area, Niuhu Village, Guanlan Sub-district, Longhua District, Shenzhen City, Guangdong Province, China

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