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BORY1 - Bory 1 Crystalline Glaze
CELECG - Celestite Crystalline Glaze
FAAO - Fa's All-Opaque Crystalline Glaze
FAC5 - Crystal Number Five Glaze
FO - Octal Crystalline Glaze
G1214M - 20x5 Cone 6 Base Glossy Glaze
G1214W - Cone 6 Transparent Base
G1214Z1 - Cone 6 Silky CaO matte base glaze
G1215U - Low Expansion Glossy Clear Cone 6
G1216L - Transparent for Cone 6 Porcelains
G1216M - Cone 6 Ultraclear Glaze for Porcelains
G1916Q - Low Fire Highly-Expansion-Adjustable Transparent
G1947U - Cone 10 Glossy transparent glaze
G2000 - LA Matte Cone 6 Matte White
G2240 - Cone 10R Classic Spodumene Matte
G2571A - Cone 10 Silky Dolomite Matte glaze
G2826R - Floating Blue Cone 5-6 Original Glaze Recipe
G2826X - Randy's Red Cone 5
g2851H - Ravenscrag Cone 6 High Calcium Matte Blue
G2853B - Cone 04 Clear Ravenscrag School Glaze
G2896 - Ravenscrag Plum Red Cone 6
G2902B - Cone 6 Crystal Glaze
G2902D - Cone 6 Crystalline Development Project
G2916F - Cone 6 Stoneware/Whiteware transparent glaze
G2926B - Cone 6 Whiteware/Porcelain transparent glaze
G2926J - Low Expansion G2926B
G2928C - Ravenscrag Silky Matte for Cone 6
G2931H - Ulexite High Expansion Zero3 Clear Glaze
G2931K - Low Fire Fritted Zero3 Transparent Glaze
G2931L - Low Expansion Low-Fire Clear
G2934 - Matte Glaze Base for Cone 6
G2934Y - Cone 6 Magnesia Matte Low LOI Version
G3806C - Cone 6 Clear Fluid-Melt transparent glaze
G3838A - Low Expansion Transparent for P300 Porcelain
G3879 - Cone 04 Transparent Low-Expansion transparent glaze
GA10-A - Alberta Slip Base Cone 10R
GA10-B - Alberta Slip Tenmoku Cone 10R
GA10-D - Alberta Slip Black Cone 10R
GA10x-A - Alberta Slip Base for cone 10 oxidation
GA6-A - Alberta Slip Cone 6 transparent honey glaze
GA6-B - Alberta Slip Cone 6 transparent honey glaze
GA6-C - Alberta Slip Floating Blue Cone 6
GA6-D - Alberta Slip Glossy Brown Cone 6
GA6-F - Alberta Slip Cone 6 Oatmeal
GA6-G - Alberta Slip Lithium Brown Cone 6
GA6-G1 - Alberta Slip Lithium Brown Cone 6 Low Expansion
GA6-H - Alberta Slip Cone 6 Black
GBCG - Generic Base Crystalline Glaze
GC106 - GC106 Base Crystalline Glaze
GR10-A - Pure Ravenscrag Slip
GR10-B - Ravenscrag Cone 10R Gloss Base
GR10-C - Ravenscrag Cone 10R Silky Talc Matte
GR10-E - Alberta Slip:Ravenscrag Cone 10R Celadon
GR10-G - Ravenscrag Cone 10 Oxidation Variegated White
GR10-J - Ravenscrag Cone 10R Dolomite Matte
GR10-J1 - Ravenscrag Cone 10R Bamboo Matte
GR10-K1 - Ravenscrag Cone 10R Tenmoku
GR10-L - Ravenscrag Iron Crystal
GR6-A - Ravenscrag Cone 6 Clear Glossy Base
GR6-B - Ravenscrag Cone 6 Variegated Light Glossy Blue
GR6-C - Ravenscrag Cone 6 White Glossy
GR6-D - Ravenscrag Cone 6 Glossy Black
GR6-E - Ravenscrag Cone 6 Raspberry Glossy
GR6-H - Ravenscrag Cone 6 Oatmeal Matte
GR6-L - Ravenscrag Cone 6 Transparent Burgundy
GR6-M - Ravenscrag Cone 6 Floating Blue
GR6-N - Ravenscrag Alberta Brilliant Cone 6 Celadon
- GRANITE Crystalline Glaze
L2000 - 25 Porcelain
L3341B - Alberta Slip Iron Crystal Cone 10R
L3685U - Cone 03 White Engobe Recipe
L3724F - Cone 03 Terra Cotta Stoneware
L3924C - Zero3 Porcelain Experimental
L3954B - Cone 6 Engobe (for M340)
L3954N - Cone 10R Base White Engobe Recipe for stonewares
MGBase1 - High Calcium Semimatte 1 (Mastering Glazes)
MGBase2 - High Calcium Semimatte 2 (Mastering Glazes)
MGBase3 - General Purpose Glossy Base 1 (Mastering Glazes)
MGBase4 - Glossy Base 2 Cone 6 (Mastering Glazes)
MGBase5 - Glossy Clear Liner Cone 6 (Mastering Glazes)
MGBase6 - Zinc Semimatte Glossy Base Cone 6
MGBase7 - Raspberry Cone 6 (Mastering Glazes)
MGBase8 - Waxwing Brown Cone 6 (Mastering Glazes)
MGBase9 - Waterfall Brown Cone 6 (Mastering Glazes)
TNF2CG - Tin Foil II Crystalline Glaze
VESUCG - Vesuvius Crystalline Glaze

GRNTCG - GRANITE Crystalline Glaze

Modified: 2022-10-13 21:48:58

Cone 8-10 - High titanium variant

Material	Amount
Ferro Frit 3110	48.00
Zinc Oxide	22.00
Silica	20.00
Titanium Dioxide	10.00
100.00

Notes

From Crystal Glazes Book 1 by Fara Shimbo, page 134.

Maturing Cone: 8 to 10 but is at its best at cone 9.
Crystal number: Moderate amount of zinc silicate crystals, but will also produce a very large number of titanium and/or rutile crystals
Rate Of Growth: For zinc silicate crystals, 1-2 cm diameter per hour on tiles, 1 cm/h on vessels
Crystal Color: Eggshell to light yellow, opaque.
Crystal Shape: Round with lighter edges; little structure visible.
Ground Color: Ecru to white, opaque in oxidation, mauve to purple in reduction.
Crazing: Impossible to see.
Color Response: Tends to dull colors somewhat. Crystals in copper glazes will often have maroon outlines. Takes all colorants well except nickel, which should not be used. Cobalt will color the rutile crystals a peacock blue; other colorants do not affect the rutile crystals much.
Seeding properties: Lousy.

More information in Crystal Glazes book 1 page 134. Much more background information in other sections of the book.

Related Information

Granite crystal glaze

This picture has its own page with more detail, click here to see it.

This glaze is great when you just need a change from what you’ve been doing. The bowl at right was done with the base glaze, reduced. No colorants were added, so I was quite surprised when this purple came out. It seems to come out very regularly when un-tinted titanium is used.
Adding colorants seems to destroy this purple. When I added rutile to the Granite base, I got a brilliant orange. Reducing this orange color gave me a slightly less-pinkish, more “burnt orange” color, that I quite like. There is no tinge of purple at all, which I suppose is just as well.
I have had success firing this glaze as low as cone 7, but the size of the zinc silicate crystals you can grow in the glaze seems to be directly related to the temperature at which this glaze is fired: the higher the cone, the larger the crystals. I suspect this is true of crystal glazes in general, but I’m only quite sure of it in this one.

Links

Firing Schedules	Shimbo Crystal Schedule 1
Typecodes	Crystalline Glaze Recipes Fara Shimbo These are from Fara's Crystal Glazes books 1 and 2. Most are the frit 3110, zinc, silica base recipe (50:25:25) with small material additions at the expense of silica.
Recipes	GBCG - Generic Base Crystalline Glaze Cone 6-10 - Almost all other Frit 3110 recipes are based on additions to this

Mechanisms

Glaze Color	The golden color of the rutile crystals shades all colorants added to this glaze toward the yellow. In light reduction, all crystals become decidedly golden and ground (in the absence of other colorants) becomes a pale mauve.
Glaze Crystallization	This glaze produces both zinc silicate and rutile crystals. Zinc silcate crystals are patchy, but rutile crystals occur evenly spaced throughout the glaze surface (though they may be more visible where glaze is very thick).

XML to Paste Into Insight-live

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<recipeline material="Ferro Frit 3110" amount="48.000"/>
<recipeline material="Zinc Oxide" amount="22.000"/>
<recipeline material="Silica" amount="20.000"/>
<recipeline material="Titanium Dioxide" amount="10.000"/>
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By Tony Hansen
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