The reflection ratio of the curtain wall glass is not greater than 0.3 what it means
Reflective ratio of curtain wall glass can not be greater than 0.3 What is the meaning of is to control the reflected light below 30%, to prevent serious light pollution. That is, to choose the appropriate reflective coating than the coated glass.
Visible light to the glass, there are three kinds of whereabouts: through, reflection and absorption, the sum of the three is 1 or 100%, usually colorless glass reflection ratio of 13% (ie 0.13) or so - about 13% of the light Reflection, coated glass is much larger, so that will cause light pollution.
