Jewellery & Watches

Jewellery

Raw materials employed in the production of jewelry, such as alloys and composites, should not only be suitable in the production process but also provide dependable service to the wearer. The implementation of a balance between durability and cost-effectiveness, i.e., the need to use precious metals as little as possible, is one of the key factors.

But jewelry should also be able to take the daily stresses. Will the springs in catches and clasps work out well with time? Does it have strong links on the necklace to resist breaking?

To answer these questions, intense quality-control testing is necessary. Evaluation of such characteristics as tensile strength, ductility, and mechanical resilience helps to guarantee that components are performing as per the expectations with the safety of the wearers and the durability of the products.

Watches

The wristwatches and timepieces have most of the same requirements regarding strength as the jewelry, with the added complexity of complex micro-mechanical assemblies. From fashion watches up through luxury chronometers, it is a matter of consistency of performance, and that depends on the accurate interaction among various components.

Assessment of the mechanical competence and reliability of the separate elements of the assembly or individual parts are an important quality-controlling measure.

Typical applications include measuring the following:

• Friction torque of chronograph wheels, barrels, and cannon pinions.
  Static torque of rivets.
• Push and pull-out strength of spring bars.
• Operational force of crowns, pins, and clasps.
• Tensile strength and elongation of straps, bracelets, buckles, and folding clasps.
• Torque characteristics of springs and rotating bezels.

Enhancing Quality and Compliance

Presto Stantest has force, materials, and torque testing equipment to provide comprehensive solutions to jewelry and watch quality assurance. Testing may be conducted to international and industry standards like ASTM, BS, or DIN, or to in-house criteria, which in turn assists the manufacturers to remain in line with the regulations as well as enhance the reliability of the product.

Having more than 42 years of experience in material and mechanical testing, Presto Stantest is used in accurate, repeatable, and affordable quality control in both the jewelry and watch industries.