Raku & Black Fire Glazes
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Ceramics Today

Metallic Copper
Cone 06
Raku Reduction
 

Copper Carbonate  Ferro Frit 4110  Kaolin  Frit 4064

80.0  16.0  11.0  3.0

Comments: beware of lead toxicity! Bisque with glaze to 1000 C, then raku to 850 - 880 C.
Not suitable for tableware!

DRY ALLIGATOR
Raku Reduction
 

Gerstley Borate  Nephelene Syenite  Bone Ash  Copper Carb

52.5  12    23.5   12

Not suitable for tableware!
 

Copper Lustre
Raku Reduction
 

Gerstley Borate  Cornwall Stone  add Copper Carb  Red Iron Oxide

80  20  3  1

Comments: Here are a couple of tried and true glazes for raku. Not sure at what temperature they mature; we just pull 'em out when the surface looks melted.
Not suitable for tableware!

Supplied by a US subscriber.
 
 Salvatoris Rusty Red Black Fire Glaze

Copper Carbonate  Borax  Sodium Bicarbonate  Cobalt Carbonate

60.0  40  40  5.0

Comments:

• Bisquefire work to 1100^o C
• Mix glaze same day as firing
• Apply glaze thickly
• Dribble glaze on thickly for effects

Check out the Black Firing Tips & Tricks Page!

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Disclaimer: It is the responsibility of anybody using the supplied glaze recipes to be informed of glaze dangers and to ensure the proper safety precautions are met when mixing and using glazes. In general glaze components marked 'toxic!' should not be used for tableware. Othert unmarked ingredients may be harmful to health on skin contact or if ingested. Frits may contain Lead Bisilicate. General safety precautions for ceramic materials apply. Contact a supplier, lecturer or professional if in doubt. Neither Ceramics Today nor its Guide Steven Goldate will bear any responsibility for incorrectly used glazes and/or ingredients, nor for any damages due to unexpected glaze results. All glazes should be tested before use.