raku glaze

Raku Glaze

June Glaze: Forbes Midnight Blue

Midnight Blue is a rich cobalt blue with red streaks in post firing reduction.  Stay tuned for this month's pot which features previous glazes of the month:  Blue Moon, Lime Green and Sassy Fat White/Silver Slither, in addition to this month's Midnight Blue.  

Forbes Midnight Blue Glaze

Frit 3110                          68%
Custer Feldspar                18%
EPK (Kaolin)                      9%
Lithium Carbonate               5%
Copper Carbonate               4%
Cobalt Carbonate                2%
Hectorite                            2% (or Bentonite 1%)

Raku Glaze, Press & News

May 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.

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

Press & News

April Glaze : Lime Green Crackle

Lime Green Crackle glaze is fired to 1900 degrees F, pulled from the kiln and reduced in a small can with newspaper.

RAKU POTTERY GLAZE RECIPE

Frit 3110                  58%
Frit 3269                  10
Nepheline Syenite:   22
EPK (Kaolin)             5
Silica                        5
Add:
Chrome Oxide          .4 (point 4)
Tin Oxide                  3
Hectorite                   2  or Bentonite  1%

This month's glaze is a revision of my March Glaze called Lime Green Crackle. Stay tuned for a silver glaze recipe next month!

This glaze is fired to 1900 degrees F, pulled from the kiln and reduced in a small can with newspaper.  Lid is put on immediately. Wait about 2 1/2 minutes and remove the lid.  Rub the top of pot with torn newspaper using gloves.  Once paper ignites cover can again immediately and let cool (you may have to use a torch to reignite the paper).  

Raku Glaze, Press & News

March Glaze: Forbes Lime Green

As shown fired to 2000F with pyrometer so the silver glaze will melt.

RAKU POTTERY GLAZE RECIPE

Frit 3110                     54%
Nepheline Syenite    21%
EPK (Kaolin)               10%
Silica                           10%
Lithium Carbonate     5%
Add:
Chrome                       .4% (that's point 4)
Tin                               3%
Hectorite                     2%  (or 1 Bentonite dry mixed)

A note about Hectorite:  It's a suspender in powder form similar to Bentonite except it doesn't have to be dry mixed with the other chemicals.  It's not a common raku pottery glaze chemical and you may have to search for it on the web. I purchased mine at Highwater Clays, but they don't carry it anymore due to lack of demand (nobody knew what it was used for).

Raku Glaze

February Glaze: Blue Moon

Glaze fired to 1900F.

RAKU POTTERY GLAZE RECIPE

Silica                             30%
Frit 3134                        20%
Nepheline Syenite        15%     
Lithium Carbonate.       15%
EPK Kaolin                     10%
Strontium Carbonate    10%
Tin Oxide                        7%
Copper Carbonate         4%
Bentonite                         1%

 

 

 

This is a stable blue and red glaze.  1/2% Epsom Salts can be substituted for Bentonite.  This glaze produces some incredible raku pottery and is one that I developed several years ago.  This picture is the results of the raku glaze fired to 1900F. It remains a staple in my studio.  See more of my work by visiting my raku pottery store.  To learn more about my process, visit my raku firing page.