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Ancient glaze recipes and techniques used to create contemporary designs, both functional and beautiful.

 

Underglaze Red

Spin's signature Celadon White glaze gets its slight greenish blue tint from trace elements of iron-oxide, and becomes glossy once it reaches about 2450 °F (1350 °C) in our high-fire kilns. It forms the base layer for almost all of our fine porcelain pieces.

Underglaze Red is a copper oxide glaze applied underneath the celadon white glaze, which causes the underglaze to turn its distinctive red hue. It is particularly sensitive to temperature, only turning red around 2370 °F (1300 °C). Due to irregularities of temperature within the kiln, the glaze can exhibit shades of blue, green and yellow, creating a rich, polychromatic effect. This extreme sensitivity to temperature also contributes to a successful firing rate of only 40%, which explains why Underglaze Red products are typically more expensive: many must be discarded.

China Blue

The China Blue glaze is actually black when used alone. However, when it is overlaid with our Celadon White glaze, it turns royal blue. Less sensitive to temperature than the Underglaze Red, it has a successful firing rate of 70-90%.

The effect of the Crackled glaze is caused when the glaze cools and contracts faster than the body, thus having to stretch and ultimately split. After firing, ash is often rubbed on the body, highlighting and accentuating the cracks.



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