Education

The QUV accelerated weathering tester reproduces the damage caused by sunlight, rain and dew. In a few days or weeks, the QUV UV tester can reproduce the damage that occurs over months or years outdoors. To simulate outdoor weathering, the QUV accele...

A recent episode of This Old House, an American TV series that highlights do-it-yourself home improvement tasks, examined the properties of Solar Reflective Asphalt Shingles. Part of the qualification for these shingles included a QUV accelerated wea...

The first three parts in this series discussed what the QUV/uvc is and why it was developed, outlined two published UVC exposure protocols, and provided background information for developing UVC exposure protocols. In this final post in the series, w...

In the last post on the QUV/uvc, we discussed two published standards with UVC exposure protocols, covering quite different applications. In this post, we’ll discuss designing QUV/uvc exposure methods for materials that encounter UVGI protocols in us...

In our first post on the QUV/uvc, we discussed why the QUV/uvc was designed and the differences between it and the QUV accelerated weathering chamber used for generations to conduct UV weathering studies. In this post, we’ll go over published UVC exp...

The QUV/uvc is a new version of the QUV accelerated weathering tester. The main difference between it and other QUV models is that it is designed to operate UVC lamps, which are functionally identical to those used in ultraviolet germicidal irradiati...

QFS-40 and UVB-313EL lamps are both used in QUV accelerated weathering testers to provide fluorescent UV light that includes a significant UVB component for faster testing. The diagram below shows that both have similarly-shaped spectral power distri...

ASTM E3006, Standard Practice for Ultraviolet Conditioning of Photovoltaic Modules or Mini-Modules Using a Fluorescent Ultraviolet (UV) Lamp Apparatus, has been revised with a 2020 publication date. Originally published in 2015, E3006 was written to ...

Overview and Problem Statement A manufacturer of adhesives and fillers was looking for a way to better simulate yellowing failures of their products that they have seen in the field. Their products are used in the bonding, filling, and repairing...