International standardization of jewelries
International standardization of a jewelry industry
The jewelry industry has its origins many centuries ago. The production of jewelry has become not just an art and the heritage of many eras and people, but has also grown into a global and profitable industry, which, unlike other categories of activity, is distinguished by its stability and low volatility. Today, the production of jewelry has a global scale and is closely intertwined with export-import activities. Due to the fact that each country has its own separate policy for regulating the supply of precious metals, then in the implementation of international trade in jewelry, there is a need for its international regulation to unify technological parameters and quality standards. One such regulation option is international standardization.
Screening test for the presence of nickel in articles which are inserted into pierced parts of the human body and articles intended to come into direct and extensive contact with the skin
SIST-TP CEN/TR 12471:2022
Since any piece of jewelry never consists of one hundred percent of one metal, the presence of certain impurities can affect not only the pricing policy, but also the presence of certain reactions on human skin. It is to regulate and control the amount of impurities of such elements in jewelry as, for example, nickel, that international standards such as SIST-TP CEN / TR 12471:2022 were created.
This document provides a sceening test based upon the use of dimethylglyoxime to detect nickel release from articles that are inserted into pierced parts of the human body and those that are intended to come into direct and extended contact with the skin.
The screening test is suitable for manufacturers and importers as a qualitative method for inspecting articles for nickel release.
NOTE The reference method for the measurement of nickel release in EN 1811, or for spectacle frames and sunglasses, EN 16128.
Since this document is only a description of one of the possible methods for determining the presence of nickel in a piece of jewelry, we strongly recommend that it be used together with documents of a similar category to obtain a comprehensive result. If you need to clarify certain details on this document, you can always seek advice from our specialist.
Jewelery - Determination of platinum in platinum jewelery alloys - Gravimetric method after precipitation of diammonium hexachloroplatinate (ISO 11210:2014)
SIST EN ISO 11210:2016
In the production of precious metal jewelry, it is necessary to understand what percentage of which metal will be present in the final product. These calculations are necessary primarily not to calculate the cost and the final price, but to understand the physical properties of the product, which will have consequences when wearing the product and affect human health. When it comes to platinum pieces, the application of international standards such as SIST EN ISO 11210:2016 plays a huge role.
ISO 11210:2014 specifies a gravimetric method for the determination of platinum in platinum jewelery alloys, preferably within the range of fineness stated in ISO 9202. These alloys can contain palladium, iridium, rhodium, copper, cobalt, gold, ruthenium, gallium, chromium, indium, and less than 5% tungsten. Some modifications are indicated where palladium, iridium, rhodium, gold, or ruthenium are present.
The correct application of an international standard can make a huge difference in the quality of the product produced and its bottom line when entering more global markets. That is why if you are interested in the permanent growth of your business, we recommend that you always have international standards available and follow their updates in your industry.
Jewelery and precious metals — Sampling of precious metals and precious metal alloys
With an abundance of products and a large number of metals, it is sometimes very difficult to find a quality product that is actually made from precious metals. That is why many businesses are wondering how to check the quality of purchased products and maintain their reputation. One of the verification options is the acquisition of international standards with a detailed description of the methodology for identifying the ratio of metals, one of which is ISO 11596:2021.
This document specifies a method of sampling precious metals and precious metal alloys for the determination of their precious metal content and for the assessment of their homogeneity. The document is applicable to raw materials, semi-finished products and finished products and is intended to be used only for the sampling of entirely metallic materials.
NOTE 1 Standards for determination of precious metals contents for different metals are listed in the Bibliography.
NOTE 2 For assaying techniques different from the listed ones other sampling procedures can be required.
NOTE 3 For the purpose of production control or lot inspections the International Standards for the sampling indicated in the Bibliography or corresponding guidelines can be applied in addition.
If you or your company are engaged in the production and operation of jewelry, this international document will help to significantly protect you from the presence of low-quality products and, as a result, protect you from reputational problems in the market.
Jewelery and precious metals - Determination of gold - Cupellation method (fire assay) (ISO 11426:2021)
SIST EN ISO 11426:2021
The definition of the concept of gold, despite the ease of semantic perception, in a technical context, can have a large number of aspects. The consumer is not interested in these technical aspects, because when paying for a product or service, a person strives only for quality. However, manufacturers must understand that quality is ensured by following international norms and rules, prescribed in international standards such as SIST EN ISO 11426:2021.
This document specifies a cupellation method (fire assay) for the determination of gold on a materialconsidered homogeneous.
The gold content of the sample lies preferably between 100 and 999.5 parts per thousand (‰) by weight. Fineness above 999.5 ‰ can be determined using a spectroscopy method by difference (e.g. ISO 15093).
The procedure is applicable to most types of gold samples. Some modifications are indicated for specific cases (presence of large amount of base metals, platinum or palladium, silver). It is not compatible with the presence above trace levels of iridium, rhodium and ruthenium (more than 0.25‰ for the sum ofall three elements).
This method is also intended to be used as the recommended method for the determination of fineness in jewelery alloys covered by ISO 9202.
Thus, the application of the recommendations specified in this document will help to significantly clarify in production what technical and chemical parameters gold has, which should be used to produce high-quality products that are of interest to the consumer.
Jewelry and International Standards
To date, there is a huge amount of jewelry that has a large number of alloys and certain metals in the composition. That is why, in order to increase the company's position in a fairly competitive global market, it is necessary to improve quality indicators and have a set of international standards available. Today, this industry is developing more and more actively and, due to the economic impact of gold, will gain momentum every year. Medium and large businesses are developing on an increasingly large scale in the context of digitalization and informatization, which is why it should be understood that only the availability of high-quality information about the norms and rules of the market for your activities and constant monitoring of updates to the rules can be a significant competitive advantage.
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