What is a Shino Glaze?
Shino is a generic term for a family of glazes. The first Shino glazes were developed in Japan in the mid to late 1500’s. The first modern Shino glazes were developed in the 1930’s and 1940’s by Toyozo Arakawa and Hajime Kato. The first American Shino was developed by Warren MacKenzie in 1974.
Reduction Firing and Shino Glazes:
The term reduction refers to the amount of carbon in a kiln while it is firing. Our regular weekly firing is lightly reduced (very little carbon). Our shino glazes respond well to medium reduction. The amount of reduction in a firing is increase by decreasing the amount of oxygen available to the burning fuel (propane). This is most often accomplished by restricting the damper.
Our Shino glazes contain Soda Ash. As the glaze dries on your pot, ash will leach to the surface and look like powder on the outside of your pot. Once the powder appears on the side of your pot, try not to touch it. Your finder prints will show up on the final product. Please do not move other peoples pots that have ash on the outside of them for any reason.
The Soda Ash makes these glazes trap carbon during the firing process. If all goes well this creates fantastic color variation. However, carbon trap glazes are risky to use. If there is to much reduction in the kiln late in the firing, your pot will turn snot green. We work hard to make sure this does not happen; but, there are no guarantees. Getting the right amount of reduction in a kiln is more of an art than a science.
If you paint a design on your pot with wax immediately after glazing it (before the ash comes to the surface) the design will come out on the finished product. This happens because the wax stops the ash from leaching to the surface during the drying process.
Shino Glazes Available at BHC
Lehman’s Shino: A medium whitish orange glaze that is very textural
Wirts Shino: A light orange rather smooth glaze. When it comes out well, it has a warm honey like look. If you apply this glaze to thick it will turn white. Keep it thin.
Shogun Shino: This glaze is orange when it is thin and crawls and makes lots of crazy texture when it it thick.
Glazing Shino’s at BHC
- The shino glazes can be at the far end of the glaze room
- You can dip, poor or spray shino glazes
- Once your pot has been glazed place it on the shelf labeled “Shino Only” in the kiln yard.
- Write which shino glaze you have used on a piece of paper and place under your pot. The kiln loaders need to know which glaze is on your pot. This is important.
Other Glazes that work well in a Shino Firing
If any of you have experience with Shino glazes, we would love to hear your comments below!