On Saturday, September 15, 2018 at 5:54:57 AM UTC-7, wrote:
Q13: What is the new SC- (Solar Control) Material?
A: The following is a Technical Bulletin from Polycast:
Enhanced Protection from Ultraviolet "A" radiation
UVA exposure can increase the risk of skin cancer and will damage most organic materials. Standard plastic transparencies block practically all UVB and about 80% of UVA rays. Polycast SC colors block all of the UV and 99% of all UVA rays. The harm caused by UV can be reduced by a factor of 20, when SC products are compared to standard acrylic materials.

UV radiation intensely increases approximately 5% with every 1000 ft of altitude while traditional plastic transparencies provide adequate UV protection at sea level it is insufficient at higher altitudes. Pilots, passengers and interior materials may be exposed to periods of high UVA radiation without the protection offered by Polycast SCTM.
Solar Energy Control
For small and medium-sized aircraft and helicopters, the interior heat build up is a serious problem when not in flight. Polycast SCTM colors block out a significant portion of the Near-Infrared Radiation (NIR); this results in less heat. This benefit is gained without sacrificing Visible Light Transmission (VLT), compared to standard materials. For a given VLT, Polycast SCTM colors reduce the NIR radiation (solar energy heat) that penetrates the aircraft by about 30%.
Benefits are synergistic
Damage to aircraft interiors results from periods of inactivity while parked in the sun. The combination of UV radiation (*even at sea level) and high temperatures accelerate the rate of damage to all nonmetallic materials inside the aircraft. The rate of photochemical degradation of organic materials exposed to UV radiation is approximately doubled with every 18°F temperature increase. Keeping the temperatures lower and the UV out will increase the service life of interior components.

All plexiglas blocks 98+% of UV, which is a good thing when you fly 7+ hours at altitudes over 12,000 ft. If you don't think so, put SPF 60 on one arm and leave the other one w/o prior to a long flight. Afterwards, see if there is any difference between the two.

Tom