Raku & Black Fire Glazes
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Ceramics Today

Metallic Copper
Cone 06
Raku Reduction
 
Copper Carbonate 
Ferro Frit 4110 
Kaolin 
Frit 4064 toxic!
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:

Check out the Black Firing Tips & Tricks Page!
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.