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Ravenscrag Cone 10R Dolomite Matte

Code: GR10-J
Modification Date: 2019-03-20 16:43:53
Member of Group: RV10

Plainsman Cone 10R Ravenscrag Slip based glaze. It can be found among others at http://ravenscrag.com.

MaterialAmount
Ravenscrag Slip51.6
Dolomite12.1
Talc2.6
Boraq 5 (Gerstley Borate sub)4.0
Calcined Kaolin13.5
Custer Feldspar16.2
 100.00  

Notes

This is the classic cone 10 reduction silky white matte, its feel, beauty and utility are very difficult to match in any other system. Unlike many feldspar saturated dolomite mattes in use, this one does not craze on stonewares and it does not cutlery mark or stain.

This glaze was developed from the popular G2571A, it has the same chemistry however it sources that chemistry from a completely different recipe based on Ravenscrag Slip (this is a good example of how Insight ceramic chemistry software can be used). The pleasant silky surface is almost identical (though slightly darker in color due to a little higher iron content). Add a little zircopax (e.g. 3-5%) to whiten the color if you desire or if you need to precisely match the G2571A. This glaze has the characteristic superb application and suspending properties of Ravenscrag Slip glazes.

Note that the calcined kaolin is important. If you use raw kaolin, the glaze will shrink too much during drying. For a slip glaze, raw kaolin would be OK. If you do not have the Boraq (Gerstley Borate substitute) then you can substitute real Gerstley Borate or another equivalent.

The two most common variations are bamboo and robin's egg blue (see photos here).

Mar 2015: We have found a tendency for this glaze to craze on some stonewares after decal firings. See the linked picture.

Out Bound Links

In Bound Links

XML to Paste Into Insight

<?xml version="1.0"?>
<recipes version="1.0" encoding="UTF-8">
<recipe name="Ravenscrag Cone 10R Dolomite Matte" keywords="Plainsman Cone 10R Ravenscrag Slip based glaze. It can be found among others at http://ravenscrag.com." id="91" date="2019-03-20" codenum="GR10-J" altcodenum="G2895">
<recipelines>
<recipeline material="Ravenscrag Slip" amount="51.600" unitabbr="kg" conversion="1.0000" added="0"/>
<recipeline material="Dolomite" amount="12.100" unitabbr="kg" conversion="1.0000" added="0"/>
<recipeline material="Talc" amount="2.600" unitabbr="kg" conversion="1.0000" added="0"/>
<recipeline material="Boraq 5 (Gerstley Borate sub)" amount="4.000" unitabbr="kg" conversion="1.0000" added="0"/>
<recipeline material="Calcined Kaolin" amount="13.500" unitabbr="kg" conversion="1.0000" added="0"/>
<recipeline material="Custer Feldspar" amount="16.200" unitabbr="kg" conversion="1.0000" added="0"/>
<url url="https://digitalfire.com/4sight/recipes/ravenscrag_cone_10r_dolomite_matte_91.html" descrip="Recipe page at digitalfire.com"/>
</recipelines>
<urls/>
</recipe>
</recipes>


By Tony Hansen




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