One of the benefits of the TUFTEX PolyCarb Clear panels is that they block UV radiation. UV radiation from sunlight causes sunburn, contributes to long-term skin damage, and can cause fading of furniture or other colored objects.
We sent samples of our TUFTEX PolyCarb panels to a company that does transmission measurements for UV radiation for the spectrum of 400 nanometers down to 250 nanometers. These tests in a laboratory are difficult and dangerous because UV radiation is not visible, so these tests should only be done by professionals with the proper safety equipment.
The data from the transmission test shows that the UV transmission of TUFTEX PolyCarb Clear panels is very similar to glass. Earlier tests on the transmission of TUFTEX PolyCarb Clear panels for the visible spectrum also showed results that were very similar to glass. Therefore, TUFTEX PolyCarb Clear panels are a very good substitute for glass panels in greenhouse and sunroom applications.
Within the context of sunlight, the ultraviolet spectrum is divided into three regions: long wave (UVA), medium wave (UVB) and short wave (UVC).
- UVA spectrum: 315 to 400 nanometers (not absorbed by the ozone layer)
- UVB spectrum: 280 to 315 nanometers (partially absorbed by the ozone layer)
- UVC spectrum: 100 to 280 nanometers (absorbed by the ozone layer and atmosphere)
The test results for TUFTEX PolyCarb Clear panels showed that they blocked
- 99.8 % of UVA below 370 nanometers
- 99.9% of UVB
- 99.9% of UVC above 250 nanometers
In the near UV range of 370 to 400 nanometers, TUFTEX PolyCarb Clear panels have a gradual transition of blocking UV with 99.8% at 370 nm, 88.0% at 380 nm, 39.0% at 390 nm, and 16.7% at 400 nm. The transition from UV to the visible spectrum begins at 400 nm. As we showed in an earlier post, TUFTEX PolyCarb Clear panels reach 89% transmission over the visible spectrum, which is equivalent to clear glass.
If you are considering TUFTEX PolyCarb Clear panels for a greenhouse, we did tests that showed TUFTEX PolyCarb Clear panels are an excellent choice because they pass 89% of Photosynthetically Active Radiation (PAR) energy from sunlight, which again is equivalent to clear glass.
We hope you find this information helpful as you consider TUFTEX PolyCarb Clear panels for your project.