All about glass > Light Transmission

Optical properties of glass products are expressed by:

light transmission TL   light reflexion  RL    light absorption  AL TL + RL + AL = 100%

Light transmission TL is the proportion of the visible spectrum which is transmitted through the glass
expressed as a percentage%

For a greater light transmission an extra-clear or low-iron glass may be necessary :
 

thickness in  mm	8	10	12	15	19
low-iron glass	91	91	91	90	90
traditional float glass	87	86	85	84	82