What makes a glaze a Shino?
What makes a glaze a Shino?
Shino glaze (志野釉, Shino uwagusuri) is a generic term for a family of pottery glazes. They tend to range in color from milky white to orange, sometimes with charcoal grey spotting, known as “carbon trap” which is the trapping of carbon in the glaze during the firing process.
What does ash do in a glaze?
What Does Wood Ash Contain? Wood ash contains high amounts of calcium and low amounts of alumina and silica. However, the silica and alumina in the clay body can fuse with a thin layer of ash glaze to make a glaze that’s harder than imaginable without much of those ingredients needing to be directly added to the glaze.
How do you make ash glaze?
I decided to make ash glazes using 50 parts Redart and 50 parts ash. Through my experimentation, I learned to use sprayers for applying an ash glaze. To begin, prepare ashes by running them through a flour sifter to remove unburned wood, charcoal and big chunks of debris, then run the dry ash through a 40-mesh screen.
What is wood ash glaze?
Ash glazes are ceramic glazes made from the ash of various kinds of wood or straw. Some potters like to achieve random effects by setting up the kiln so that ash created during firing falls onto the pots; this is called “natural” or “naturally occurring” ash glaze.
Is Ash a clay?
Ash is considered a white, medium-fire stoneware clay which can be fired both oxidation and reduction.
What is Shino glaze?
Shino glazes were developed in Japan and their aesthetics are covered on many other web sites and books. But they are described by artists using the language of art. However this page is about understanding the chemistry and the mechanisms of the color development with a view to achieving it in functional ware using modern materials and kilns.
How does the Shino visual develop?
The Shino visual seems much more basic: Orange where thin, cream where thick. However, given the absence of an iron wash below the Shino (which would obviously produce color where the glaze is thin), there is some mystery to how the color appears to develop at the body:glaze interface (showing through where the glaze is thinner).
Why do pot potters use Shino finish?
Potters doing utilitarian pieces with the Shino effect today often want a more glossy, functional finish instead of the traditional matte surfaces (with defects). They also want something that can be put into an existing firing with other ware (e.g. cone 10 reduction).
What are Shinos made of?
Originally Shinos were a two-part mix of about 70-80% high-alumina, high-sodium feldspar and 20-30% clay. They were used on stoneware and wood-fired in reduction. Applied thickly they gave a pearly white, when thinner a red or orange.
