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Zirconium Silicate, 250g
£6.24 (inc VAT)
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.
Description
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.
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.
