Wednesday, January 31, 2007

RAKU "Unearthed Glaze"

UNEARTHED GLAZE:
Lithium Carbonate 70
Borax 10
Bentonite 15
Feldspar(custer) 5
___
100
Chrome Oxide 8

I learned about this glaze from another California Ceramic Artist, Kristin Doner
This is a very rustic glaze. It makes pieces look like it was just pulled out of the ocean. This is a low fire raku glaze, and its a great glaze to study a glaze as if fluxes during a firing. Pieces fired with this glaze are taken out of the kiln in the middle of the fluxing process, during the "bubbling" phase. This gives the textured result somewhat resembling craters and barnacles. Lithium Carbonate and Borax react with the change in atmosphere of the raku process. Chrome Oxide in the glaze gives it that green color other colorants can be used for different effects. If left in a raku kiln to cool, this glaze turns into a yellow orange color.

Like most raku glazes, this glaze is not food safe. You should wear gloves when handling this glaze. High percentage of lithium carbonate in this glaze makes this glaze very toxic.

1 comment:

dark_one said...

My name is Jason Gorman and I am 45 years old. My wife was taking 1200mg of Lithium Carbonate daily prescribed by the doctor for over two years. During this time no lab work was ever ordered. It built up in her system over a period of time. She was taken to the ER where she almost died. Her pulse was down to 31 and her blood pressure as low as 43 over 17. She under went kidney dialysis continuously for over 30 hours in ICU. She spent a total of 5 days in the hospital. I strongly recommend against taking Lithium. At least have periodic Lab Work done. Also if you do take this medication look up the side effects on the internet.

My wife has experienced some of these side effects-
Dizziness, Vomiting, Diarrhea, Confusion, Tremors, Muscle Weakness, Loss of Bladder Control, Inability to talk

I hope this information will be useful to others,
Jason Gorman

Lithium-Carbonate Side Effects