Share from Insight-live.com (Lab Documentation and Calculation System) by Digitalfire. https://digitalfire.com
How I derived a typical chemistry for a Shino glaze and then created a recipe of materials to source that chemistry. It worked first time.
Project Name Create a clay similar to Bizen from Japan Project Codenumber UnAssigned Notes This work is based on two samples from Glen Lewis. We are assuming these samples are representative of Bizen type clay. |
Bizen Clay
Notes *This was brought from Japan by Glen Lewis. It has 10% mountain clay and 5% sand added. But that sand is not evident in the particle size distribution and only a few quartz particles can be seen in the photo. The body is in fact very fine particled and slick. Pictures Original Dried sample we recieved I got around 300 grams (enough to do 4 test bars, LOI test and sieve analysis). Plastic bars for both Japan clays Bizen particle size distribution Top left to bottom right (mesh): Bizen clay and Shino glaze development G3840 Shino on L3912 Bizen body The wax resist brushstrokes (done right after glazing) and clearly defined. This indicates that soda migration to the surface during drying is an important mechanism of the effect. Testdata SHAB - Shrinkage/Absorption
SIEV - Sieve Analysis 35-325 Wet
LDW - LOI/Density/Water Content
XML (to paste into Insight) Born: 2016-09-21, Modified: 2016-10-17 13:27:49 |
Bizen Duplicate using Plainsman Materials
Total:100.00 Notes *Plainsman 3C clay has a very similar character to the Bizen clay tested (very plastic, high carbon). However it is refractory and high in quartz. That is actually good since the high expansion Shino glaze should craze less. But to get the lower porosity of the Bizen body I added 15% nepheline syenite. Also added 5% M2 to up the iron content to react with the Shino glaze (without it the 3C would fire quite white). Pictures L3916 Bizen duplicate with G3840 Shino Glaze - Cone 10R These glaze were applied fairly thin. G3840 Shino on L3912 Bizen body The wax resist brushstrokes (done right after glazing) and clearly defined. This indicates that soda migration to the surface during drying is an important mechanism of the effect. Bizen clay and Shino glaze development Bizen clay duplicate bars - iPhone 6 Bizen clay bars - iPhone 4 Testdata SHAB - Shrinkage/Absorption
XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Bizen Duplicate using Plainsman Materials" id="94477" key="LD53hCH8" date="2016-12-01" codenum="L3916"> <recipelines> <recipeline material="3C" amount="80.000"/> <recipeline material="M2" amount="5.000"/> <recipeline material="Nepheline Syenite" amount="15.000"/> </recipelines> </recipe> </recipes> Born: 2016-09-28, Modified: 2016-12-01 14:16:34 |
Shino Trial Number 1
Total:100.00 Auto Unity Formula
Notes *This is the first attempt at creating a Shino glaze. The rationalization for its recipe can be found on the Digitalfire Reference Database glossary page for Shino glazes (like below). Pictures Shino glaze dried Shino glaze slurry Notice the bubbles. These are a product of the spodumene, but also likely the soda ash. They create the blisters on the surface of the dried glaze. L3916 Bizen duplicate with G3840 Shino Glaze - Cone 10R These glaze were applied fairly thin. Shino glazes on google.com The color and character of my glaze seems quite similar to many of the ones I see on google. G3840 Shino on L3912 Bizen body The wax resist brushstrokes (done right after glazing) and clearly defined. This indicates that soda migration to the surface during drying is an important mechanism of the effect. G3840 Shino on PolarIce/CrystalIce Mix URLs Shino Glazes at Di..Reference Database XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Shino Trial Number 1" id="94385" key="4dEwStPe" date="2019-02-19" codenum="G3840"> <recipelines> <recipeline material="Nepheline Syenite" amount="50.000"/> <recipeline material="EPK" amount="20.000"/> <recipeline material="Soda Ash" amount="10.000"/> <recipeline material="Redart" amount="5.000"/> <recipeline material="Spodumene" amount="15.000"/> </recipelines> </recipe> </recipes> Born: 2016-09-25, Modified: 2019-02-19 14:21:14 |