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GR6-L - Ravenscrag Cone 6 Transparent Burgundy

Modified: 2019-03-13 15:01:24

A stain-based method to achieve this color using the Ravenscrag base recipe.

Material Amount
Ravenscrag Slip*40.00
Calcined Ravenscrag Slip*40.00
Ferro Frit 3134*20.00
Added
Mason 6006 Stain*10.00
110.00

Notes

This is an excellent alternative to the GR6-E Raspberry because the recipe is simpler, just a stain addition to the standard transparent. It is easy to adjust the amount of frit to get the exact shade you want.

Because this is transparent (contains no opacifier), different thicknesses have different intensities of color. Because it employs a stain it will be very more consistent that one using chrome and tin. Add an opacifier to create a more pastel color with less depth.

No special firing curve is needed and the surface fires very clean and defect free (with a normal soak at cone 6).

For mixing instructions please see the master recipe, GR6-A.

A breaking glaze highlights incised decoration

A breaking glaze highlights incised decoration

This is the Ravenscrag slip cone 6 base (GR6-A which is 80 Ravenscrag, 20 Frit 3134) with 10% Mason 6006 stain. Notice how the color is white where it thins on contours, this is called "breaking". Thus we say that this glaze "breaks to white". The development of this color needs the right chemistry in the host glaze and it needs depth to work (on the edges the glaze is too thin so there is no color). The breaking phenomenon has many mechanisms, this is just one. Interestingly, this transparent base has more entrained micro-bubbles than a frit-based glaze, these enhance the color effect.

Add a Mason burgundy stain to Ravenscrag cone 6 Clear and wow!

Add a Mason burgundy stain to Ravenscrag cone 6 Clear and wow!

This is GR6-L Ravenscrag Burgundy on porcelain at cone 6. The amount of stain is higher than usual (about 13% instead of 10%), thus the color is darker.

GR6-L Ravenscrag Burgundy fired at cone 6 on Plainsman M370

GR6-L Ravenscrag Burgundy fired at cone 6 on Plainsman M370

The stain has been cut to 10% giving the glaze more transparency and making it vary more in color with changing thickness.

Ravenscrag Cone 6 Raspberry glaze on dark and light burning bodies

Ravenscrag Cone 6 Raspberry glaze on dark and light burning bodies

The body on the left has 10% burnt umber adding (Plainsman M340) and fires chocolate brown (right is standard M340). The manganese (in the umber) is greatly affecting the appearance of the glaze (GR6-L).

Links

Recipes GR6-A - Ravenscrag Cone 6 Clear Glossy Base
This Plainsman Cone 6 Ravenscrag Slip base is just the pure material with 20% added frit to make it melt to a glossy natural clear.
Recipes GR6-E - Ravenscrag Cone 6 Raspberry Glossy
A chrome-tin burgundy glaze using the Ravenscrag cone 6 base recipe.

XML to Paste Into Insight

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By Tony Hansen


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