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About Ouma Chain | Ouma Chain | Perfecting your creativity
 
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  • About Ouma Chain

    Perfecting your creativity

    About Ouma Chain

    With over 35 years of foundational experience in the jewelry business, our devotion to maintain our reputation as a leader in jewelry manufacturing has led to the up rise of Ouma Chain in 2014. We understand that stone setting can be challenging and time consuming even for experienced craftsman, therefore we have incorporated the latest state-of-the-art technology from Italy and Germany to fulfill the needs of precision and quality gems to the jewelry industries. Our automated technology enables the integration of variety jewelry gems into the jewel chain, allowing the merging of exotic designs for further processing. Choose Ouma Chain to perfect your creativity in your world class standard Jewel Tennis Chain and Finished Jewel Chains Bracelet. With Ouma Chain, creativity can be also delivered with quality and efficiency.

    Company Headquarter Profile

    Hsin Yi Gems Group was established in 1978 in Thailand, during the era where the processing industry of synthetic diamond – cubic zirconia was in its sprouting stage.

    Our headquarter is based in Thailand while our branches spread through Hong Kong, China and Taiwan; providing a wide range of carefully graded products for our customers in the Asia Pacific regions. Since 1993, the branch sales offices and factories established at the three locations in the cross-strait have also provided customers in these areas with the most direct after-sales services.

    In 1998, the company set up its second export business office in Hong Kong with the aims to deliver the same enthusiasm to serve worldwide customers with synthetic gemstones. Meanwhile, in 2005, in order to keep up with the rapid increase in sales, the company purchased a new piece of land in China with a total area of 67,000m² for in 2005 to expand its factory premise, the expansion project is divided into three phases. Phase I was completed in July 2007, the factory premise now accommodates 3,000 processing workers, thereby laying a strong foundation in self-production and self-marketing of its products.

    With the accumulation of hard work and a mind to serve our clients to our best ability, Hsin Yi Gems Group has become a leading jewelry manufacturer producing the most sophisticated cubic zirconia and synthetic stone. Coupled with the expanded regional sales offices at various Asian districts, the company has succeeded in providing the best services and the fastest delivery speed for a large number of customers.

    Blog post Image

    Image description:   Ouma Chain Thailand factory

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    Production

    Ouma Chain works as a team to provide quality and efficiency to the hands of fellow jewelry industries. We differentiate ourselves to our competitors by utilizing the latest full automated Italian and German state-of-the-art technology provided in the market today. In addition, our engineering team continuously develops strategies to increase production efficiency and accuracy. To ensure quality is always delivered, our Quality Control team closely inspects each production step to final product.

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    Gemstone

    Fine Quality Gemstones in Heart Brilliant Cut

    • Gemstone cuts: European machine cut
    • Gemstone colors: 7 colors
    • Gemstone Size: 1.50mm, 1.75mm and 3.00mm
    • Gemstone embedment methods: Full automation embedment via state-of-the-art Italian machinery with high precision​

    History

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    Certification

    OUMA CHAINS gladly provide you with any certification upon request, such as our SGS reports to meet the quality and safety standards for you to market these perfect chains.

    Different types of products targeted at different age group (e.g. children or adults) holds varying regulation requirements depending on the location these fine jewelry would be sold. In order to pass governmental regulations for the right to commerce, in the past we have provided our customers with silver and brass test SGS certification reports, these certifications have indicated that the products that we have delivered meet the regulations for the customers’ targeted location in the following areas:

    OUMA Silver chain testing

  • Lead in accessible substrate materials for determining ‘Standard Operating Procedure for Determining total Lead (Pb) in children’s metal products (including children’s metal jewelry). The lead test requirement on accessible material in the submitted sample is not applicable. The product scope that mentioned by CPSIA section 101(a)(2) is for children product up to age 12.
  • Total Cadmium Content (Cd) in children’s metal products requirement is 0.0075% limit quoted from US Connecticut Public Act 10-113. The SGS results indicate that Cadmium Content was NOT DETECTED, indicating meeting safety requirements. In addition, to provide you with an idea of product regulation requirements, the requirement for total cadmium in children’s jewelry are summarized below for 2 states in America. In the state of Connecticut, under the Public Act 10-113 regulation, jewelry or children up to the age of 12 is required to be below 0.0075% detected, as of July 1, 2014. In California, under the Chapter 313 (SB 929, Statutes of 2010) regulation, jewelry for children up to the age of 6 is required to be below 0.3% detection, as of January 1, 2012.
  • Nickel Release (With non-coated material) tested for the amount of release limited at 0.5ug/cm2/week and 0.2 ug/cm2/week requirements as specified in American entry 27 of Regulation (EC) No 552/2009 emending Annex XVII of REACH Regulation (EC) No 1907/2006 indicates our silver product passed the analysis performed by ICP-OES, with a nickel resale of 3 trials all indicating below 0.1 (ug/cm2/week), whereas the requirements of limit (ug/cm2/week) are 0.5.
  • OUMA Brass chain testing

  • Lead in accessible substrate materials for determining ‘Standard Operating Procedure for Determining total Lead (Pb) in children’s metal products (including children’s metal jewelry). The lead test requirement on accessible material in the submitted sample is not applicable. The product scope that mentioned by CPSIA section 101(a)(2) is for children product up to age 12.
  • Total Cadmium Content (Cd) in children’s metal products requirement is 0.0075% limit quoted from US Connecticut Public Act 10-113. The SGS results indicate that Cadmium Content was NOT DETECTED, indicating meeting safety requirements. In addition, to provide you with an idea of product regulation requirements, the requirement for total cadmium in children’s jewelry are summarized below for 2 states in America. In the state of Connecticut, under the Public Act 10-113 regulation, jewelry or children up to the age of 12 is required to be below 0.0075% detected, as of July 1, 2014. In California, under the Chapter 313 (SB 929, Statutes of 2010) regulation, jewelry for children up to the age of 6 is required to be below 0.3% detection, as of January 1, 2012.
  • Nickel Release (With non-coated material) tested for the amount of release limited at 0.5ug/cm2/week and 0.2 ug/cm2/week requirements as specified in American entry 27 of Regulation (EC) No 552/2009 emending Annex XVII of REACH Regulation (EC) No 1907/2006 indicates our silver product passed the analysis performed by ICP-OES, with a nickel resale of 3 trials all indicating below 0.1 (ug/cm2/week), whereas the requirements of limit (ug/cm2/week) are 0.5.