Low-iron glass (extra-clear glass)

Low-iron glass (often sold as 'extra-clear' or 'ultra-clear') is glass made with a much lower iron content than standard float glass. Ordinary glass has a faint green tint — obvious on thick panels and pale colours — because of the iron in it; low-iron glass removes most of that, so it looks near-colourless and truer. It's used wherever the green cast would show: a pale or white back-painted glass splashback (so white reads as white, not minty), shower screens, glass balustrades, shelving and display, and anywhere thick or light-coloured glass is on show. It costs a bit more than standard glass and is usually toughened for the same safety uses. For a pale splashback or a large clear screen where colour accuracy matters, it's worth specifying — see the glass splashback thread, and a glass and glazing specialist can advise when it's needed.