I wouldn't print outside--UV light will be pretty unavoidable. Even average windows block a decent chunk of UV light, allowing you to take the covers off for removing prints and refilling resin. But outside you'll be fighting with rapid curing no matter how well you try and shield the sun. Introduction. Awareness of ultraviolet (UV) radiation damage to the skin has risen substantially over recent decades, and effective measures have been implemented to improve UV protection of the skin. 1 – 3 Although evidence has been accumulating that the eye too is vulnerable to UV damage, a comprehensive generally accepted definition of a sun protection factor for the eye (similar to a To block lasers like these, you will need a beam dump – a device designed to safely absorb and dissipate laser energy. In many cases, an energy or power detector can act as a beam dump, as long as it is used within its specified safety rating. Beam dumps must have a heavy-duty absorption surface with low reflectivity. 7 High-performance UV Resistant Plastics. High-performance uv resistant plastics are a popular choice for various applications due to their exceptional properties. Here are seven of the best options available in the market today; PTFE, PVDF, HDPE, PEI, PPS, Acrylic, and Polycarbonate. Referencing the table below, general purpose acrylic naturally filters all UV light below 345nm (100% UVB), but only 35% of UVA light. Simliarly, ordinary window glass passes about 90% of the light above 350nm, but blocks over 90% of the light below 300nm. 1.1 The effect of UV When sunlight falls onto polycarbonate, the polycarbonate molecules absorb energy of certain wavelengths in the UV range, this is particularly so for the ester groups and the aromatic rings which are strong UV absorbers. The absorbed energy can cause the rupture of covalent bonds initiating photo-oxidation and A recent report shows alarming degradation of water resistance in some WRBs after exposure to ultraviolet radiation. Water-resistive barriers like the plastic housewrap on the walls of this home can lose their water resistance if they are exposed to sunlight for too long. A water-resistive barrier (WRB) provides protection against water damage What Materials Block Uv. Physical Science. Ultraviolet (UV) light is invisible to the human eye, but gets a lot of attention. After all, UV light can cause sunburns, suntans, or skin cancer. It can fog photographs, make objects fluoresce, or even attract butterflies to flowers (they can see into the UV spectrum). iUOZ.