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Ravenscrag Cone 6 Glossy Black

Code: GR6-D
Modification Date: 2016-09-30 22:45:04
Member of Group: RV6

Plainsman Cone 6 Ravenscrag Slip based glaze. It can be found among others at

Ravenscrag Slip80.070.2%
Ferro Frit 313420.017.5%
Iron Oxide Red13.011.4%
Cobalt Oxide0.50.4%
Chrome Oxide0.50.4%

Firing Schedule

Rate (F)Temp (F)Hold (Min)Step


Every potter wants a good reliable glossy black glaze that has a minimum of toxic metals and fires to an even color without pinholes and blisters. Ravenscrag slip has the unusual ability to host a black color from a high iron content (only a tiny amount of cobalt oxide and chrome oxide are needed).

Ravenscrag Black on Plainsman M340

Ravenscrag cone 6 black

Ravenscrag cone 6 black

13 iron, 0.5 cobalt, 0.5 chrome added to the GR6-A base.

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By Tony Hansen


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