UltraBlock ultraviolet (UV) blocking filters are designed to block more than 99 percent of the harmful ultraviolet wavelengths between 200 nm and 380 nm and transmit greater than 90 percent (average) of the visible wavelengths between 425 nm and 700 nm. From Deposition Sciences, UltraBlock coatings efficiently transmit visible light without changing the color appearance of the source material. Extremely stable over temperature and humidity changes, this robust, uniform coating meets or surpasses the severe abrasion, adhesion, humidity and salt fog tests of Mil-C-675 standards.