Shino Glazes

Traditional Japanese high feldspar glazes having cream to orange color flashing or blushing. Potters today seek to emulate the Shino appearance using a wide range of recipes.

Details

Shino glazed small bowl from Japan

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One of my efforts at Shino (see below)

viscosity calcined melt fluidity calculated thermal expansion low-expansion vitreous crystalline glazes G3840 Redart

Related Information

Closeup of Shino glazed small bowl from Japan

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Clay is vitreous and heavily grogged. But it is white burning. Notice the orange color is developing at the glaze/body interface and shows where the glaze is thin. This is glossier than what one would normally expect a Shino to be.

Heavily speckled reduction fired porcelain Shino bowl by Glenn Lewis

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This effect was created by wedging 10 mesh ironstone concretions into the soft porcelain.

Shino bowl made by Joshua Miller

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White body. Double fired, first to cone 11 (reduced from 1800F up as for copper reds). A thin second layer of the Shino glaze was applied and a second slow-climb firing was done to cone 05, this produced the metallic effect. This is a Malcom Davis glaze (with Redart). Joshua Miller, the creator of this piece, mentors under his father, Victor Miller.

Closeup of unglazed surface of small Shigaraki bowl

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This is the unglazed surface. Very heavily grogged, very large grog particles.

Closeup of unglazed surface of small Bizen bowl

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The fired clay is vitreous and lightly grogged (large particles).

G3840 Shino on Grolleg/New Zealand kaolin porcelain at cone 10R

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The color is developing despite the fact that very little iron is available from the body. I have glazed the inside of this mug with a durable liner glaze to make it functional. The porcelain contains more than 30% silica but the Shino is still crazing on it.

Calculating the recipe of a cone 10R Shino glaze

Two small brown, matte shino bowls

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The wax resist brushstrokes (done right after glazing) are clearly defined indicating that soda migration to the surface during drying is an important mechanism of the effect. Some carbon trapping is also visible on the lower section of the larger bowl (and other pieces in other places in the kiln). The glaze has been applied fairly thinly so no whiter areas are visible. This was part of a project I did to understand, not what Shino glazes look like, but what they are. Chemically. The code for the project was G3840.

Links

Glossary	Carbon trap glazes A type of ceramc glaze.
Glossary	Carbon Burnout Ceramic materials, especially clays, often contain carbon and organic compounds. When they are fired in a kiln, these must burn out, often producing complications.
Glossary	Calcination Calcining is simply firing a ceramic material to create a powder of new physical properties. Often it is done to kill the plasticity or burn away the hydrates, carbonates, sulfates of a clay or refractory material.
Glossary	Ceramic Glaze Ceramic glazes are glasses that have been adjusted to work on and with the clay body they are applied to.
URLs	https://insight-live.com/insight/share.php?z=Lt1ZK6wGyE Shino/Bizen Formulation Project at Plainsman Clays

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