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Ravenscrag Slip 1000F Roast

Alternate Names: Ravenscrag Slip Roast

Oxide Analysis Formula
CaO 10.70% 0.68
MgO 1.80% 0.16
K2O 3.20% 0.12
BaO 0.30% 0.01
Na2O 0.50% 0.03
TiO2 0.40% 0.02
SiO2 65.80% 3.92
Fe2O3 0.90% 0.02
Al2O3 13.40% 0.47
Oxide Weight 347.19
Formula Weight 357.93

Related Information

One simple addition makes Ravenscrag Slip into a fabulous silky matte glaze: 10% talc

Two mugs with silky matte glaze

The clays are Plainsman H450 and H550. Firing is cone 10 reduction. A 50:50 mix of roasted and raw Ravenscrag slip was used. L3954N black engobe was applied at leather hard stage (on the insides and partway down the outsides). We call this recipe GR10-C Ravenscrag Talc Matte, it is on the insides of both and on the outside of the one on the left. The outside of the other is G2571A Bamboo, it is also an excellent matte base. The silky matte surfaces produced by these two are both functional (they are very durable and do not stain or cutlery mark). And they are very pleasant to the touch.


URLs http://ravenscrag.com
Ravenscrag web site
URLs https://plainsmanclays.com/data/index.php?product=12911
Ravenscrag Data Sheet at Plainsman Clays
Typecodes Clay Other
Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically.
Materials Ravenscrag Slip
Materials Ravenscrag Slip 1900F Calcined

By Tony Hansen

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