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GR10-C - Ravenscrag Cone 10R Silky Talc Matte

Modified: 2019-05-26 09:56:08

Just Ravenscrag Slip plus 10% talc produces a visually variegated surface that feels silky and looks stunning!

Material Amount
Ravenscrag Slip Raw*45.00
Ravenscrag Slip 1000F Roast*45.00
Talc*10.00
100.00

Notes

This glaze is more silky (less matte) than the GR10-J glaze, it is more beautiful visually and to the touch than a photo can convey. It works well on both buff and dark stonewares and even porcelain. It would also be an excellent base for the addition of a zircon opacifier and of colors.

For mixing instructions please see the notes for the base GR10-A recipe.

RavenTalc silky matte on the outside of a cone 10R buff stoneware mug

RavenTalc silky matte on the outside of a cone 10R buff stoneware mug

GR10-C Ravenscrag cone 10R silky matte glaze closeup (on Plainsman H550 stoneware). The recipe is 90% Ravenscrag Slip (roast:raw combo) and 10% talc. The inside of this piece just has pure Ravenscrag (raw:roast).

Laguna B-Mix, B-Mix+Fireclay with Ravenscrag GR10-A, GR10-C glazes

Laguna B-Mix, B-Mix+Fireclay with Ravenscrag GR10-A, GR10-C glazes

Left two mugs are glazed with pure Ravenscrag Slip (roast:raw combo), far right one is RavenTalc silky matte (GR10-C). The speckled mugs have 10% of a Plainsman Fire-Red (a blend of a red fireclay, M2 and a heavily speckled ball clay).

Transparent and RavenTalc silky matte glazes on black engobe at cone 10R

Transparent and RavenTalc silky matte glazes on black engobe at cone 10R

Clay is Plainsman H450. The L3954N black engobe was applied at leather hard stage (on the insides and partway down the outside). The G1947U clear glossy glaze over it on the inside produces a deep and vibrant hue (left). The inside glaze on the right is GR10-C Ravenscrag silky matte. The outsides are GR10-J Ravenscrag Dolomite matte with a little added cobalt and iron (for blue and brown).

Laguna B-Mix Cone 10R mugs with Alberta and Ravenscrag glazes

Laguna B-Mix Cone 10R mugs with Alberta and Ravenscrag glazes

B-Mix is a popular high-ball clay very plastic grey cone 10R stoneware in North America. The two mugs on the left have pure Ravenscrag Slip on the inside (the middle on the outside also), it fires almost transparent with a slightly silky surface. Pure Alberta Slip is employed on the outside of the left one and the inside of the right one. The outside of the right one is RavenTalc silky matte. In all cases the Ravenscrag and Alberta Slip are mixed half-and-half calcined and raw. B-Mix fires dark enough and with enough specks that a normal transparent glaze is not very interesting. But these Ravenscrag ones look much better (for liner glazes).

Plainsman H435 with Ravenscrag Talc glaze matte inside, Ravenscrag Dolomite matte outside

Plainsman H435 with Ravenscrag Talc glaze matte inside, Ravenscrag Dolomite matte outside

Fired at cone 10R. The GR10-C Raven-Talc matte is just 90% Ravenscrag Slip and 10% talc. This produces a stunning silky, variegated surface (which could be a base for many colorants). The GR10-J Raven-Dolomite matte was patterned after our G2571A glaze, but using as much Ravenscrag Slip in the recipe as possible while maintaining the same chemistry (its surface is less variegated and more matte).

Difference between oxidation and reduction! GR10-C matte on Plainsman H443

Difference between oxidation and reduction! GR10-C matte on Plainsman H443

Same body, same glaze. Left is cone 10 oxidation, right is cone 10 reduction. What a difference! This is a Ravenscrag-Slip-based recipe on a high-fire iron stoneware. In reduction, the iron oxide in the body and glaze darkens (especially the body) and melts much more. The behavior of the tin oxide opacifier is also much different (having very little opacifying effect in reduction).

Ravenscrag talc matte glaze mugs

Ravenscrag talc matte glaze mugs

Clays are Plainsman H450 and H550. The L3954N black engobe was applied at leather hard stage (on the insides and partway down the outsides). The insides are glazed with GR10-C Ravenscrag silky matte (and the outside of the one on the left). The outside of the other is G2571A Bamboo.

Links

Recipes GR10-A - Pure Ravenscrag Slip
Ravenscrag all by itself makes a great cone 10 reduction semi-gloss glaze. It also has great working properties.
Recipes G2928C - Ravenscrag Silky Matte for Cone 6
Plainsman Cone 6 Ravenscrag Slip based glaze. It can be found among others at http://ravenscrag.com.
Recipes GR10-J - Ravenscrag Cone 10R Dolomite Matte
Plainsman Cone 10R Ravenscrag Slip based glaze. It can be found among others at http://ravenscrag.com.
Glossary Matte Glaze
Random material mixes that melt well overwhelmingly want to be glossy, creating a matte glaze that is also functional is not an easy task.

XML to Paste Into Insight

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<recipe name="Ravenscrag Cone 10R Silky Talc Matte" keywords="Just Ravenscrag Slip plus 10% talc produces a visually variegated surface that feels silky and looks stunning!" id="95" date="2019-05-26" codenum="GR10-C" altcodenum="G2852B">
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<recipeline material="Ravenscrag Slip 1000F Roast" amount="45.000"/>
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By Tony Hansen


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