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Tag Articles : SUNTEST

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  Color Stability of Dental Materials and Artificial Gums

  May 15, 2023 | Dr. Oliver D Rahaeuser

  Applications

  Over the past decade, dental implants and dentures have become a reliable method of restoring missing teeth. Materials used have been extensively researched and their physical and chemical properties are well understood. Today, implant materials have been improved towards being biocompatible, corrosion and break resistant. All combined with excitingly realistic aesthetics. To ensure long-term aesthetics, color stability testing against daylight has always been critical.

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  Monitoring of Test Tolerances

  November 30, 2022 | Dr. Oliver D Rahaeuser

  Technology

  Best practice for any weathering instrument is not only to record all relevant test parameters as time-dependent values. They also need to be monitored against their allowed min/max tolerances which are often specified in testing standards. These min/max tolerances are also called operational fluctuations.

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  Unique Atlas StoreLight Filter

  October 31, 2022 | Dr. Oliver D Rahaeuser

  Technology

  Today, I would like to share with you the story behind the StoreLight™ filter. This optical filter represents a unique feature in lightfastness testing, available exclusively from Atlas.

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  Testing of Photodegradable Plastics

  October 12, 2022 | Dr. Oliver D Rahaeuser

  Applications

  At the end of its life, plastic, and more specifically plastic packaging, ends up in the environment as waste.

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  Durability Testing of LCD and OLED Displays

  July 12, 2022 | Dr. Oliver D Rahaeuser

  Applications

  Digital displays are embedded in almost every electronic device or piece of machinery available today.

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  ICH Testing of Pharmaceuticals – Part 2 - Sample Preparation

  December 20, 2021 | Dr. Oliver D Rahaeuser

  Applications

  In an earlier post, we discussed the basic ICH Q1B requirements. We saw that the SUNTEST provides great speed of testing, and we also discussed the often-heard statement of UV “over-exposure”. In this post, we will discuss the matter of sample preparation by looking at three simple but important examples.

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  ICH Testing of Pharmaceuticals – Part 1 - Exposure Conditions

  December 13, 2021 | Dr. Oliver D Rahaeuser

  Applications

  The FDA (American Food & Drug Administration) requires that all new drugs be tested for shelf life by exposing drugs to simulated sunlight. The international ICH guidelines define appropriate light sources and provides test guidelines. The guidelines Q1B state that drugs must be exposed to a minimum of 1.2 million lux-hours of visible light and a minimum of 200 W·h/m2 UVA light. These tests are also referred to as Confirmatory Studies.

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  The Differences Between Material and Product Testing

  September 6, 2021 | Dr. Oliver D Rahaeuser

  Technology

  Durability tests and the service life predictions for materials and products that are derived from them are a challenge for every product development team. When designing a testing program, one of the first questions that you will undoubtedly ask yourself is “What is the ideal test for my material and/or product?” Answering this question is not always easy as the world of weathering and durability testing is so versatile that it can quickly become confusing. But it does not have to be and knowing the right questions to ask yourself can help to make choosing the right test method for your material or product easier.

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  What is the Right Choice: Xenon Flat Tray or Rotating Rack?

  August 16, 2021 | Dr. Oliver D Rahaeuser

  Technology

  For the past 50 years, xenon arc weathering has been performed mainly in two styles of instruments: flat tray and rotating rack. Each design has its advantages and disadvantages. Do you know which style is right for your test? Let’s discuss what points we should consider when trying to decide between the two.

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