Michelle H. Lowe on sat 21 mar 98
At 09:06 AM 3/18/98 EST, amy parker wrote:
>----------------------------Original message----------------------------
>All the clear recipes I can find are glossy - very very shiny! Is there an
>easy way to cut the "shine" on these, or does anyone have a clear matte? All
>the mattes that i find are not CLEAR - this is to go over colored clay, so
>it is essential that the color show through.
Hi,
This is a repeat of a post I put on clayart in 1996 sometime, with recipes
and results from testing lots of cone 6 clears. As I recall there were two
or three semi-matt surfaces I found very appealing, which I noted below.
>
>Tested some clears last week.
>On B-mix clay (white stoneware)
>Test tiles were little bowls with a brush mark of red iron oxide and
>another of a blue underglaze (Duncan).
>
>Fired in my electric kiln to cone 7-ish, with a one hour soak at the end.
>I found most of these clear recipes on the CeramicsWeb, either in the
>database or the clayart archived glazes by searching for the keyword
>"clear" and/or by browsing the cone 6 recipes. There is a search by glaze
>name, so will post these. If anyone has trouble finding the recipes, email
>me privately and I'll post them to you.
>
>and now...for the results...
>
>I. oops, no name for this one, but it's color: Semi-opaque Peacock Blue
>(tested it without the colorants and with)
> Cone: 5 - 6
> Color: Semi-opaque Peacock Blue
> Surface: Satin Matte
>
>Nepheline Syenite 42.00
>Gerstley Borate 12.00
>Dolomite 7.00
>Talc 14.00
>EPK 5.00
>Flint 20.00
> Total: 100.00 %
> Also add: (colorants, etc.)
>Cobalt Carbonate 0.50
>Chrome Oxide 0.50
>Iron Oxide 0.50
>
>
>
>Without colorants: semigloss clear, washes out the iron and the underglaze
>slightly, crazed very slightly where pooled but not anywhere else.
>
>With colorants: not really peacock blue, more a hunter/forest green semi
>translucent with iron oxide looking really nice underneath and underglaze
>also peeking through.
>
>II. Yikes, guess I didn't save all the glaze names, sorry, color: opaque
>white
>I tested with and without tin oxide, both versions a VERY dry surface, not
>really functional, I'd say it needs more flux. Colorants show through on
>both, both are white (at least in their unmelted state).
>
>Cone: 5 - 6
> Color: Opaque White
> Surface: Satin
> Firing Type: Ox or Red
>Kona F-4 Spar 19.00
>Custer Feldspar 19.00
>Nepheline Syenite 19.00
>Dolomite 25.00
>Whiting 6.00
>Kaolin 12.00
> Total: 100.00 %
> Also add: (colorants, etc.)
>Tin Oxide 7.50
>
>III. Glaze name: V.C. G 5
>very glossy, crazed, washed almost all the iron oxide out, underglaze is
>nice underneath.
>
>UnitGlaze Name: V.C. G 5
> Cone: 5 - 6
> Color: Semi-opaque Clear
> Surface: Semi-Gloss
> Firing Type: Ox or Red
>
>Nepheline Syenite 40.00
>Gerstley Borate 5.00
>Whiting 16.00
>Dolomite 3.00
>Zinc Oxide 2.00
>Frit 3124 10.00
>EPK 4.00
>Flint 20.00
> Total: 100.00 %
> Also add: (colorants, etc.)
>
>
>IV. Glaze name: V. C. Karen Weinkauf
>nice semi gloss surface, great melt, iron and underglaze nice underneath,
>slight craze where pooled
>
>Glaze Name: V.C. Karen Weinkauf
> Cone: 4 - 6
> Color: Transparent Clear
> Surface: Very Glossy
> Firing Type: Oxidation
>
>Frit 3110 40.00
>Frit 3124 10.00
>Nepheline Sye 20.00
>Flint 15.00
>Clay 10.00
>Soda Ash 5.00
> Total: 100.00 %
>
>
>
>V. Glaze name: Matt Base 5
>beautiful semi matt, nice melt, washed out iron slightly, underglaze nice.
>
> AlGlaze Name: Matt Base 5
> Cone: 5 - 6
> Color: SemiOpaque White
> Surface: Satin Matte
> Firing Type: Ox or Red
>
>Custer Feldspar 40.00
>Frit 3124 9.00
>Talc 9.00
>Whiting 16.00
>EPK 10.00
>Flint 16.00
> Total: 100.00 %
> Also add: (colorants, etc.)
>
>
>VI. Glaze name: Transparent 4
>very glossy, crazed, iron oxide and underglaze both still bright but sort
>of moved in firing...
>
>Glaze Name: Transparent 4
> Cone: 5 - 6
> Color: Transparent Clear
> Surface: Glossy
> Firing Type: Ox or Red
>
>Cornwall Stone 47
>Gerstley Borate 47
>EPK 4
>Bentonite 2
> Total: 100.00 %
> Also add: (colorants, etc.)
>
>VII. Transparent Glossy 3
>glossy, crazed, washed out iron oxide, sort of washed out underglaze but
>not totally
>EGlaze Name: Transparent Glossy 3
> Cone: 5 - 6
> Color: Transparent Clear
> Surface: Glossy
> Firing Type: Ox or Red
>
>Custer Feldspar 40.00
>Gerstley Borate 18.00
>Whiting 16.00
>EPK 10.00
>Flint 16.00
> Total: 100.00 %
> Also add: (colorants, etc.)
>
>
>VIII. no name (sorry)
>My absolute favorite of all, semi matt, beautiful surface, iron and
>underglaze relatively stable underneath.
>
>Glaze Name: SCVC 5
> Cone: 5 - 6
> Color: Semi - opaque White
> Surface: Semi-satin, Waxy Matt
> Firing Type: Ox or Red
>
>Cornwall Stone 40.00
>Frit 3124 9.00
>Talc 9.00
>Whiting 16.00
>EPK 10.00
>Flint 16.00
> Total: 100.00 %
> Also add: (colorants, etc.)
>
>
>IX. Basic
>gloss, crazed, iron and underglaze VERY stable underneath, if this glaze
>wasn't crazed I'd like it the best for leaving the underneath decoration
>the most like intended.
>
>UnityName: Basic
> Cone: 5 - 6
> Color: Variable
> Surface: Variable
> Firing Type: Ox or Red
>
>K-200 Feldspar 43.00
>EPK 14.00
>Whiting 20.00
>Flint 23.00
> Total: 100.00 %
> Also add: (colorants, etc.)
>
>
>X. Gloss Clear (not sure where I got this, send for recipe)
>glossy, not crazed, left iron and underglaze fairly stable
>
>Gloss Clear
>Gerstley Borate 25
>Flint 15
>Kaolin 15
>
>XI. Satin White (tested without tin oxide)
>semi opaque white (even without tin!) semi gloss, no craze, colorants look
>nice underneath although partially covered by magnesium on surface.
>
>Satin White
>Flint 15
>EPK 2.5
>F4 Spar 10
>Talc 7
>Gerstley Borate 16
>
>
>
>
Michelle Lowe, potter in the Phoenix desert \|/ |
mishlowe@indirect.com -O- | |
mishlowe@aztec.asu.edu /|\ | | |
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http://www.amug.org/~mishlowe ____ |
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