context: environment-friendly and safer models of nylon and polyester zippers have been emphasised in 2004. It has been predicted that within that year, more than 50% of Asia's zipper makers would be using azo-free dyes (‘azo’ - a combining form of azote - is a known carcinogen). Nickel-free plating for the teeth, sliders and pull tabs is also more widely practiced in the industry, but these models are usually priced 8 to 10% higher than regular models. Some makers are also assuring customers of low cadmium and lead content by having products inspected by certifying organisations such as SGS (Société Générale de Surveillance), the world’s leading inspection, verification, testing and certification company. Because buyers of fashion products are demanding stronger zippers, makers of zippers in nylon and polyester are developing models that combine metal teeth with these two materials.

company: KEE Zippers LTD., established in 1989, is a professional manufacturer engaged in producing the full series of KEE Zippers. The firm designs, develops, produces and sells zippers all along. The company is ISO 9000-certified. This certification is primarily concerned with quality management, which means that a company follows well-defined procedures for ensuring quality products.

products: KEE is the trademark of environment-friendly zippers that meet ASTM (American Society for Testing and Materials) standards. ASTM International is one of the largest voluntary standards development organizations in the world - a trusted source for technical standards for materials, products, systems, and services. KEE zippers are exported to more than 30 countries worldwide.

sustainability features: an auto-lock, open-end zipper, model No. 3 is durable and non-corrosive. It has an overall stretching force of 70lbs, with each tooth having a tolerance of 8.5lbs.