Pilkington Optiwhite™ is a low-iron extra clear float glass with very high light transmission. It is practically colourless, and the green cast inherent to other glasses is not as present. It is therefore ideal for use where a neutral colour is desired when viewing through the thickness of the glass. As its light transmission is higher than clear float glass, it is perfect for applications where transparency and purity of colour are desired. Note that this glass is not to be viewed on the edge but through the thickness for a more true color. This is due to the fact that as the pieces get larger the tint/hue of the edge will appear with more of a green color than smaller pieces while still being lighter than a regular piece of glass of the same size.