Ultra clear glass is a type of high-clarity glass that is made from silica with very low amounts of iron,so it is also called low iron glass.This low level of iron removes the greenish-blue tint that can be seen especially on larger and thicker sizes of glass.Low-iron glass is used for aquariums, display cases, some windows, and other applications where clarity is desired. It has 91.5% light transmittance with a high class look and multiple function so that people call it “prince of crystal”.Low iron glass has all the features that float glass has,and also suitable for deep processing like float glass.