Zirconium Silicate, 250g

£6.24

Extremely stable cool white opacifier, survives without melting at very high temperatures. 4-7% produces semi opaque, 8-10% usually produces full opacity but some transparent glazes can require more.

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Extremely stable, survives without melting at very high temperatures. 4-7% produces semi opaque, 8-10% usually produces full opacity but some transparent glazes can require more.

Low expansion levels means help reducing crazing, although crawling and pin holing can occur in high zircon melts – normally solved by cooling slower and ensuring a good bond between clay and glaze.

Less reactive with colourants than tin. Less effective as a opacifier than tin, however, stiffens the glaze and produces a harder glaze surface, as well as reducing thermal expansion more effectively than tin.

Weight 0.25 kg