UV rays from the sun are emitted year-round. On cloudy days, up to 90% of UV rays can pass through the cloud cover. Additionally, snow can reflect up to 80% of UV rays. UV radiation increases at higher altitudes – worth keeping in mind for outdoor activities in both warmer and colder seasons. UV scattering agents bend UV rays so they pass through a thicker layer of sunscreen and have more opportunity to be absorbed or scattered by active ingredients.48 These substances should provide a benefit similar to a thicker layer of sunscreen, and affect both UVA and UVB rays. Dow’s Sunspheres™ are hollow spheres approximately 250 nm in Mesh and Screen in the Vivarium. Anything that is placed between the lamp and the reptile will absorb a percentage of the UVB. Ordinary glass will absorb 99-100% of the UVB; most plastics will absorb almost all. It is therefore very important that there is no plastic or glass between the bare tube and the reptile. Sheets sizes can vary from the manufacturer and some are cut from larger sheets. Because of this, the sheet dimensions are nominal and might be +/- saw cut. Call 1-800-474-3688 if you have any questions before placing your order. .125" x 24" x 48" UV Filter OP3/UF-5 Sheet. .125" x 24" x 48" UV Filter Plexiglass Acrylic Sheet OP3/UF-5. PET is sensitive to UV light especially at elevated temperatures, under high humidity, and in the presence of oxygen—all of which are present when PET bottles are exposed to the weather. In response, Plastic Technologies, Inc. (Holland, OH) undertook a study to understand the effects weathering would have on PET bottles exposed to Toledo, OH Introduction. Ultraviolet (UV) light is invisible to our eyes, and has higher energy than visible light. "When considering the effect of UV radiation on human health and the environment, the range of UV wavelengths is often subdivided into UVA (400–315 nm), also called Long Wave or 'black light'; UVB (315–280 nm), also called Medium Wave; and UVC (< 280 nm), also called Short Wave or Fortunately, Polyplastics and TOPAS Advanced Polymers provide a line of glass-clear, medical grade plastics with high UV transmission so that tests utilizing UVA, UVB, and with the right grade, even UVC down to 220nm can be carried out with confidence. No other plastic material can deliver this level of UV transparency. Pure and Clear 2DpP.

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