Ceramic Glaze Soda Feldspar

The bottom samples are balls that have melted down at cone 7 and 8.

Ceramic glaze soda feldspar.

However some differences will be apparent. Custer feldspar nako al2o3 6sio2 is a one of the primary feldspars. Minspar 200 is a 200 mesh flotation grade soda feldspar. Which are true mineral names.

Used extensively in both clay up to 25 and glaze up to 100. A soda feldspar cone 4 7. Issues surrounding substitution with complex materials knao vs. Crystalline minerals made up of mainly silica and alumina in combination with sodium and potassium oxides.

K2o na2o evaluation substitution rules vs. Feldspar one of the most common materials found in glazes can be classified into three groups. Potash feldspars such as custer and g 200. Contains mainly potassium but also has sodium and calcium.

Albite mineral from which soda feldspar is derived often tends to be white in appearance compared with the pinkish hue of orthoclase mineral from which potash feldspar is ground. Sodium feldspars kona f 4 nepheline syenite 270x nepheline sy enite 400x. Quantity discounts are available. In many cases soda and potash feldspar are interchangeable in glaze recipes.

Pure soda feldspar minspar 200 fired like a glaze at cone 4 5 6 and 7 on porcelainous stoneware samples. Feldspars used in ceramic glazes and clay making. Quantity discounts are available. Potassium fluxed glazes have greater durability than soda fluxed glazes.

Often considered a natural frit. Potash feld spars custer g 200 k200 and primas p no longer available are buckingham oxford yankee clinchfield 202 key stone maine madoc h a 3 and el brook. Also serious crazing is highlighted on the cone 6 sample it is also happening at cone 5 and 7. F4 is no longer availab.

Notice there is no melting at all at cone 4. The potassium fluxes include. Potassium is preferred for high fire glazes. Feldspar is an important ingredient in clay bodies and glazes.

Soda feldspar normally melts better.