
Violet tungsten oxide may be used to prepare thermal insulation paper with “high light transmission”. This kind of heat insulation paper can almost completely block ultraviolet rays (99% UV blocking rate). The shielding rate of UV is not 100% as proper amount of ultraviolet radiation has a bactericidal effect and also has dings of adjusting and improving nerves, endocrine, digestion, circulation, respiration, blood, immune system, and promoting vitamin D production. However, excessive amount of ultraviolet light is not good, especially…