---
title: Newly-published ISO 23741 standard quantifies water spray delivery in xenon arc testing
description: Q-Lab is pleased to announce that the International Standards Organization (ISO) has recently published the brand-new standard ISO 23741 - Plastics — Determination of spray water delivery during spray cycles when using a xenon arc weathering test apparatus.
image: https://blog.q-lab.com/hubfs/iso_23741_plastic_chairs.jpg
---
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# Newly-published ISO 23741 standard quantifies water spray delivery in xenon arc testing
Posted by [Andy Francis](https://blog.q-lab.com/author/andy-francis) on Apr 30, 2021 2:50:25 PM
Q-Lab is pleased to announce that the International Standards Organization (ISO) has recently published the brand-new standard **[ISO 23741 - *Plastics — Determination of spray water delivery during spray cycles when using a xenon arc weathering test apparatus*](https://www.iso.org/standard/76806.html)**. This standard offers users of xenon arc weathering testers a standardized method for quantifying the amount of water spray delivered to specimens during testing. This standard procedure can be used in any xenon arc tester – rotating rack or flat array.
Although irradiance and temperature are typically specified in detail in weathering test standards, the amount of water spray is rarely quantified, even though water is a major factor in weathering degradation of materials. **ASTM D7869** - *Standard Practice for Xenon Arc Exposure Test with Enhanced Light and Water Exposure for Transportation Coatings* includes a mandatory method to ensure that at least a minimum amount of water reaches specimens, but Q-Lab believed that ISO should also publish guidelines for quantifying water delivery. Proposed by Chief Operating Officer **Brad Reis** and with Global Standards and Calibration Manager **Gary Cornell** serving as project leader, ISO 23741 takes an important step in ensuring proper water delivery in xenon are weathering testing.
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