Low iron and extra-white glasses differ from other types of glass by their basic raw material composition. They are made with a low or very low iron content in order to minimize their absorption properties, therefore letting as much light and heat as possible through the glass.
Low iron or extra white glass can be used in windows or facades as it offers greater clarity than normal clear float glass, which allows occupants to appreciate exact colours and unimpaired views. It is also particularly of use for solar-energy applications where it is important that the glass cover lets light through to reach the thermal tubes or photovoltaic cells.
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