UV ray testing is a type of test that consists in exposing a product to concentrated UV rays to reproduce the effects of years of weatherization. It is also possible to use temperature and humidity to recreate different environmental conditions, including extreme weather. These tests are important because they can be used to detect a number of issues.

Plastic can sometimes crack due to weatherization. UV ray testing will show you how many years of exposure your product can go through without the plastic to crack or become brittle. It can nearly replicate the travel of time in an accelerated fashion.

This type of tests can also show you how much humidity is absorbed by your product. A product that absorbs a lot of humidity will not last long, and this is usually a sign that you need to use higher quality materials.
Weatherization can often cause damages to the coating of a product. The coating will typically start peeling, cracks may appear and the coating can fall off in some cases. UV ray testing will show you how many years of uses customers can get out of your product before the coating becomes damaged.
Fading and yellowing are other common issues caused by sunlight and weather, especially with products made from plastic or organic materials. UV ray testing will show how noticeable the fading is after years of use.
If ink is used in your product, you should know that weatherization often causes ink to fade. You should use UV ray testing to see how long the inscriptions or designs will last and could for instance use UV ray testing to see how well different types of coating protect the ink.
There are many advantages to using UV ray testing before selling your product. Look for a lab that can perform this type of tests if you are still hesitating between different materials for your product or want to know how many years of use customers will be able to get out of the products you sell.