AO | B1 | | F5 | F5-3NO-E1 | FO | G1214M | G1214W | G1214Z | G1215U | G1216L | G1216M | G1916Q | G1947U | G2000 | G2240 | G2571A | G2587 | G2826X | g2851H | G2853B | G2896 | G2902B | G2902D | G2916F | G2926B | G2926J | G2926S | G2928C | G2931H | G2931K | G2931L | G2934 | G2934Y | G3806C | G3838A | G3879 | GA10-A | GA10-B | GA10-D | GA10x-A | GA6-A | GA6-AR | GA6-B | GA6-C | GA6-D | GA6-F | GA6-G | GA6-G1 | GA6-H | GBCG1 | GBCG2 | GC | GR | GR10-A | GR10-B | GR10-C | GR10-E | GR10-G | GR10-J | GR10-J1 | GR10-K1 | GR10-L | GR6-A | GR6-B | GR6-C | GR6-D | GR6-E | GR6-F | GR6-H | GR6-L | GR6-M | GR6-N | L2000 | L3341B | L3500E | L3617A | L3685U | L3724F | L3924C | L3954B | L3954N | P3998 | P5283 | TF | VS | WM | ZZ1 |

Insight-Live Shares

| G1214Z1 - Cone 6 Calcium Matte Base | G1916Q - Cone 03-04 Expansion Adjustable Gloss Base | G2890C - Randy's Red Using Frit, Redart | G2890D - Randy's Red Using Frit, Redart, BoneAsh | G2926 - Perkins Clear | G2926A - Perkins Clear with Frit 3134 | G2926B - Cone 6 Clear Glossy Base | G2926J - G2926B Reduced COE (Li2O) | G2926S - G2926B Reduced COE (MgO) | G2931 - Worthington Cone 06-2 Clear | G2931F - Zero3 Ulexite Transparent Glaze | G2931G - Zero3 G Low Expansion Low Fire Clear | G2931H - Zero3 H High Expansion Variant | G2931K - Zero3 K Cone 03 Transparent Glaze | G2931L - Zero3 L Low Expansion Variant | G2931L2 - Zero3 L Low Expansion w/F-69 | G2932 - Deb's Clear Cone 04-02 | G2934 - Cone 6 Magnesia Matte Base | G2934Y - G2934 (lower-LOI) | G2934Y1 - G2934Y (Anti-Crawling) | G2934Y2 - G2934Y (Higher COE/Stony) | G2934Y3 - G2934 Super Durable | G2934Y4 - G2934 Super Durable #2 | G2938 - Wright's Water Blue Base | G2941A - Leach's Satin Clear Original | G2941C - Leach's Satin Clear - Craze fix | G3806 - Panama Blue Cone 6 | G3806A - Panama Blue 2 - More clay, Copper Oxide | G3806B - Panama Blue 3 - Copper Carbonate | G3806C - Panama Cone 6 Adjustment 2015 | G3806D - Panama c6 - Lower COE #1 | G3806E - Panama c6 - Lower COE #2 | G3806F - Panama c6 - Lower COE #3 | G3806K - Panama c6 - Lower COE #7 | G3806N - C6 Fluid Clear Final Recipe #10 | G3808 - Cone 6 Bright Clear - Shaun Mollonga | G3808A - Cone 6 Bright Clear using Frits | G3813 - Campana Cone 6 Transparent Glaze | G3813B - Campana Clear Lower Expansion #2 | G3813C - Campana Clear Low Expansion (no Spodumene) | G3814 - Low Zinc High Feldspar Fritless base | G3834 - Tenmoku Cone 6 | G3840 - Shino Trial Number 1 | G3868 - Gold - Cone 6 | G3868A - Gold Using Spodumene | G3868B - Gold Using Fusion Frit 493 | G3868C - Gold Using Frit #2 | G3879 - Cone 04 UltraClear Glossy Base | G3888 - Kieth Davitt High-fluid-melt copper blue | G3904 - Original Recipe Using Frit 3124 | G3904A - 3134 Mistake Recipe Fixed | GA6-A - Alberta Slip Base Glaze Cone 6 | L2626 - Barnard Slip | L3500C - Alta Slip Cone 6 Base w/Frit 3195 | L3500E - Alta Slip Cone 6 Base w/Frit 3249 | L3673 - Laguna Barnard Slip Sub | L3685U1 - Zero3 Engobe | L3685Y - Cone 03 Terrastone 2 Engobe | L3693H1 - Plastic Refractory Alumina Body H1 | L3724N2 - Zero3 Stoneware | L3778D - Cone 6 Grolleg Porcelain - VeeGum | L3778D1 - Cone 6 Grolleg Pink Porcelain | L3778D2 - Cone 6 Grolleg Blue Porcelain | L3778F - Cone 6 Grolleg Porcelain - Bentonite | L3778G - Cone 6 Translucent Grolleg Casting | L3798C - M340 Casting Body | L3798G - M340 Casting Body Revision 7 | L3806L - Panama c6 - Lower COE #8 | L3868 - Craft Crank - From PotClays, UK | L3868A - Craft Crank - Base | L3868B - Craft Crank Clone | L3869 - Crank Industrial - From England | L3869A - Industrial Crank Base | L3906 - P300 Cone 6 Casting Body | L3911 - Bizen Clay | L3916 - Bizen Duplicate using Plainsman Materials | L3954B - White Engobe for M390, M340 | L3954F - Black Cone 6 Stained Engobe | L3954J - Black Cone 10 Whiteware Engobe | L3954N - White/Black Cone 10 Engobe | L3972 - 98 Mix | L3977 - BGP Low Stoneware Body | L4001 - Plainsman Super Kiln Wash | L4005D - M390 Casting Version 5 | L4068 - Barnard Chemical Substitute | L4122 - Nevada Grey Bentonite North Pit | L4122A - Nevada Yellow Bentonite South Pit | L4125 - 3D with Nevada Bentonite South | L4125A - 3D with 20% Nevada Bentonite | L4163 - Red Art Cone 1 Body - Heather | L4170 - Terra Cotta Casting - Cone 04 | L4208D - 3B +200# particles sieved out | L4217F - M370 Cone 6 Casting Body | L4217G - M370 Cone 6 Casting Body | L4227 - Plus Clay | L4228 - Fimo Clay | L4244 - BGP Clay:Flyash Body 50:50 mix | L4244A - Bentonite Flyash Body 10:90 | L4245 - LaFarge Type F Fly Ash | L4246 - A2 +200# particles sieved out | L4247 - A3 +200# particles sieved out | L4248 - Old Hickory M23 Ball Clay | L4249 - 3D +200# particles sieved out | L4254 - Grande Prairie Clay | L4254A - Cone 1 Body Trial | L4254B - Cone 1 Body Trial 2 | L4254C - Cone 1 Body Trial 2 | L4254E - Cone 1 Body Trial 3 | L4254F - Cone 1 Body Trial 4 | L4254G - Cone 1 Body Trial 5 | L4254H - Cone 1 Body Trial 4 | L4273 - G3806N1 + 2% Zircopax | L4287 - Midfield Clay Yukon | L4287A - Catchment Clay Yukon | L4355 - SiC bonded with L4254 | P4738A - 98 BGP RETEST | P4808 - 45D | P6385 - M2 ST |

CE - Celestite Fara Shimbo Crystalline Glaze

Modified: 2013-03-25 08:46:26

High Lithium, Low Titanium Cone 7-10 Glaze

Material Amount
Ferro Frit 311050.00
Zinc Oxide25.00
Silica15.00
Spodumene5.00
Talc4.00
Titanium Dioxide1.00
100.00

Notes

Purpose: To create a glaze which would give strong, dark, true turquoises from copper through copper's interaction with lithium.

I noticed that in at least two ceramics supply catalogs, lithium carbonate
and the lithium-bearing feldspars spodumene and petalite were suggested
for obtaining copper turquoises. So I decided to give lithium a chance.
The result of several experiments is Celestite. Most glazes with very little
titanium oxide will give turquoises when only one or two percent copper
carbonate is used. With Celestite I find I can go as high as 3.5% and still
get a genuine turquoise/cyan color. Over that, however, the color does
begin to turn green.

Celestite is a somewhat fussy glaze that rewards you with infinite
wonders if you treat it right. I named it "celestite" because the typical color
of the crystals, with no colorant added to the glaze, is the same as that
of Michigan celestite crystals (which are another mineral altogether). It is,
actually, my glaze of choice when I desire to make a "white on white"
piece with no colorants at all. The crystals are particularly refractive of
light and are the easiest to see when no colorants are used to make them
stand out.

Either by itself, or with cobalt, copper and especially manganese, it
gives good results as low as 1255° and I even used it once at 1250°. With
nickel, vanadium or any of the stains, you'll need to fire Celestite at the
higher end of its range; at the lower end the glaze is either a nice matte
without crystals, or is just plain underfired. Celestite accepts all colorants
with aplomb and can even give lovely greens and golds with chrome if the
glaze is used immediately it's mixed.

Actually, Celestite is really the best bet for many copper formulations
because its crystals are opaque. In all my other transparent-ground glazes,
the crystals, when used with copper, also come out transparent and are
sometimes nearly invisible.

Firing schedule above is an example. Tweak it to find the best schedule for your kiln, glaze application and clay. Fires between cones 6 and 9. When used immediately after mixing, crystals are often slightly aquamarine without the addition of any colorant. Crystals are quick growing. Crazing is moderate when fired to cone 9. Best on porcelain although will accept some very white stonewares.

Related Information

Links

Firing Schedules Celestite
Five-step schedule by Fara Shimbo
Typecodes Crystalline Glaze Recipe Fara Shimbo
These are from Fara\'s Crystal Glazes book II.

Mechanisms

Glaze ColorWhen Celestite crystalline glaze is used immediately, crystals are often a pale aquamarine even when no actual colorant is added. Copper in small amounts is influenced toward turquoise or cyan.

XML to Paste Into Desktop Insight

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By Tony Hansen


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