Raku Pottery Glaze: Shiny Copper Flash

The flashing will vary with each firing. This was fired to 1875F and given medium post-firing reduction using newspaper after pulling from the kiln.

Shiny Copper Flash

%75 Gerstley Borate
      %12.5  Nepheline Syenite
      %12.5  EPK

    Add:
       %8 Copper Carbonate
       %2 Cobalt Carbonate
     

Raku Pottery Glaze: Copper Matt

The flashing will vary with each firing.  Both of these were fired to 1875F and given medium post-firing reduction using newspaper after pulling from the kiln.

Copper Matt

Add

%75 Gerstley Borate
      %12.5  Nepheline Syenite
      %12.5  EPK

    Add:
       %8 Copper Carbonate
       %2 Cobalt Carbonate

  Add:
       %16 Synthetic Bone Ash

     

Raku Pottery Glaze: Emerald Green Copper Flash

The raku glaze of the month is a greenish blue with copper flashes that will vary from firing to firing.

Emerald Green Copper Flash Glaze

Frit 3110:                                  30%
Frit 3124:                                  20%
Gerstley Borate:                       30%
Nepheline Syenite:                   20%
Copper Carbonate:                   5%

Raku Pottery Glaze : Forbes Sassy Fat White

With Silver Nitrate added I call this glaze Silver Slither, which is pictured.  This glaze has to be fired hot to about 1950F for the platelets to form beads.  it looks different on top of a variety of base glazes as you can see from the photos.  Works best on shoulder of pieces or on a more horizontal surface.  Mix on the thick side.  I usually apply a very small amount at a time by either pouring or brushing.  When I pour it, I often will blow on it to move it around.

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Raku Pottery Glaze Recipe

Frit 3110                        85%
Nepheline Syenite            5
EPK                              10
Add:
Tin Oxide                        7
Magnesium Carbonate    34
Hectorite                         2  or Bentonite    1
Optional:  Silver Nitrate    2

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