techniques

Tin Glaze

Also known as ‘delft’, or majolica, the liquid glaze used on the tile has an opacifier e.g. tin oxide, added to an otherwise transparent glaze to make it white and opaque (other materials can be added to produce various off white tints). This glaze is poured over the tiles and allowed to dry.                                                                                                                                                                      The unfired powdery surface is then painted by hand using mixtures of oxides and glaze stains: copper for green, cobalt for blue, manganese for purple/ pink/brown etc.                                        The chemical make-up of the underlying glaze can further vary the colours e.g. copper can be made to produce brilliant turquoise as opposed to a deep green. After decorating, the tiles are fired fixing the colours and the white glaze permanently.

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