White Lined Chipboard (WLC) – also known as GD2/3 – has middle layers of recycled pulp made from mixed recovered papers or carton waste. The top layer comprises either pulp made from selected recovered papers or bleached chemical pulp. Selected recovered paper pulp is also used for the back layer. The overall content of recycled pulp varies from about 80% to 100%. The top surface will, typically, have 2 or 3 layers of white pigment coating and it is now usual to have a layer of pigment coating on the reverse. WLC can be made with a white (WBWLC), grey or, sometimes, brown reverse.