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midrange majolica

updated thu 27 may 99

 

Sharon Miranda on wed 5 may 99

Dear clayarters: I am looking for a cone 6 majolica. I tested the one
found in the archives on the internet and it didn't work at all (pitted,
crawled, etc). I am using a white stoneware body (Miller 610) with a
little grog. Any help is greatly appreciated.

In case anyone is interested I have tested Pete Pinnell's weathered bronze
green and periwinkle, as well as floating blue and metallic black. These
glazes work great at cone 6 - metallic black is a knockout - with lots of
silver. If there is interest I can post the recipes.

Thank you,
Sharon Miranda

ababy sharon on fri 7 may 99

Hi! do you want to try this one? ( came out of Tony Hansen`s20/5)
White Base.
^6 Oxidation
Kaolin:15
Potas.Feldspare:20
Wollastonite20
Silica:15
Zinc Oxide:15
Zircopax: 15
Good and stable ( not-runny) as a white glaze. I didn`t try it as a
Majolica base yet.

good luck.
Ababi

-----Original Message-----
From: Sharon Miranda
To: CLAYART@LSV.UKY.EDU
Date: Wednesday, May 05, 1999 09:26
Subject: midrange majolica


----------------------------Original message----------------------------
Dear clayarters: I am looking for a cone 6 majolica. I tested the one
found in the archives on the internet and it didn't work at all (pitted,
crawled, etc). I am using a white stoneware body (Miller 610) with a
little grog. Any help is greatly appreciated.

In case anyone is interested I have tested Pete Pinnell's weathered bronze
green and periwinkle, as well as floating blue and metallic black. These
glazes work great at cone 6 - metallic black is a knockout - with lots of
silver. If there is interest I can post the recipes.

Thank you,
Sharon Miranda

Sondra Karipides on fri 7 may 99

Sharon - - - Here's a recipe I have in my collection, I think from Richard
Burkett. I've never tried it, though.

Majolica C/5-6

Gerst bor 5.4
Neph syen 33.4
EPK 4.7
Dolomite 2.3
Whiting 9.4
Flint 45.6
add
Zircopax 10
Bentonite 3

Hope this will work on your claybody.

Sondra

>----------------------------Original message----------------------------
>Dear clayarters: I am looking for a cone 6 majolica. I tested the one
>found in the archives on the internet and it didn't work at all (pitted,
>crawled, etc). I am using a white stoneware body (Miller 610) with a
>little grog. Any help is greatly appreciated.
>
>In case anyone is interested I have tested Pete Pinnell's weathered bronze
>green and periwinkle, as well as floating blue and metallic black. These
>glazes work great at cone 6 - metallic black is a knockout - with lots of
>silver. If there is interest I can post the recipes.
>
>Thank you,
>Sharon Miranda

Don & June MacDonald on fri 7 may 99

This is a glaze which I have used for about 10 years, it should not be
applied too thickly, likes to have two thin coats, and most stains work
well on top for painting.

June's Majolica
Cone 5 - 8 ( can be used in reduction as well)

Custer Spar 25
Gerstley Borate 33
Dolomite 5
Talc 3
EPK 15
Silica 21
+ Superpax 20

This glaze fits every clay I have ever tried it on, and wears well in
use. I know it doesn't add up to 100, but I don't like decimals!

June




Sharon Miranda wrote:
>
> ----------------------------Original message----------------------------
> Dear clayarters: I am looking for a cone 6 majolica. I tested the one
> found in the archives on the internet and it didn't work at all (pitted,
> crawled, etc). I am using a white stoneware body (Miller 610) with a
> little grog. Any help is greatly appreciated.
>
> In case anyone is interested I have tested Pete Pinnell's weathered bronze
> green and periwinkle, as well as floating blue and metallic black. These
> glazes work great at cone 6 - metallic black is a knockout - with lots of
> silver. If there is interest I can post the recipes.
>
> Thank you,
> Sharon Miranda

Richard Burkett on sat 8 may 99

Sandra Karipides said regarding midrange majolica 96:
>Sharon - - - Here's a recipe I have in my collection, I think from Richard
>Burkett. I've never tried it, though.

That glaze works pretty well, but application for any majolica is critical.
Too thick and most will crawl.

Here's the most recent recipe that we use in the SDSU shop, WITH all the
useful and critical details.
Richard Burkett

Glaze name: Midrange Majolica 96
Cone: 4 - 5 - 6
Color: Opaque White
Testing: Tested
Surface texture: Shiny or Glossy
Firing: Ox. or Red.
Glaze type:

Recipe: Percent
Gerstley borate 4.85
Nepheline Sye. 30.09
EPK 4.20
Dolomite 2.07
Whiting 8.49
Flint 41.09
Zircopax 9.21
Totals: 100.00 %

Also add:
Bentonite 3.00
Epsom salts 0.15
CMC gum (see below)

Comments:
From Linda Litteral - SDSU Glaze class 1996. She called it 'A-7 Chinese.'
Tested for new Midrange majolica for class use. Almost boron free - good
for stain colors that are subject to dissolving in boron glazes. Very
stable, does not move during firing unless quite thick. Will crawl slightly
if very thick. Use 2% bentonite instead of 3% if crawling is a problem.
Adding about a cup of CMC solution to 5 gallons of glaze will help harden
the glaze surface, too (1 TBSP CMC powder to a pint of hot water, shake
well, and let it sit overnight before using). Applies well either by
dipping or brushing.
Works well with almost all Duncan EZ-Stroke underglaze colors as majolica
washes, and so do Amaco velvet red versions of the zirconium encapsulted
red stains. Probably most stains would work well also.
Color possibities: Use mason stains mixed 50/50 with Pemco frit P-25 or
Ferro Frit 3124, or use 70 stain/30 gerstley borate in a watery mix for
colors over glaze or some combination of gerstley borate and frit. Using
too much gerstley borate may make the stain change color or become pastel.
Purple stains may need to have more flux added up to 3 parts flux to 1 part
stain. If you use all frit in the colorant wash, add liquid starch or CMC
to colors for easier brushing and to minimize smearing before they're
fired, and/or 5% or so bentonite to keep them in suspension. Use these
Duncan EZ-stroke transparent underglazes as overglaze wash for color:
EZ003, EZ004, EZ007, EZ012, EZ014, EZ019, EZ020, EZ021, EZ024, EZ025,
EZ027, EZ028, EZ030, EZ032, EZ161. Almost all the other EZstrokes will
work, especially if thinned slightly. The darker blues and the Sierra
Yellow EZstrokes will wrinkle and get rough if applied too thickly.
CoverCoat CC 154 should work as well. Most other CoverCoat colors will work
when thinly applied, but may be dry if thick. Try adding a teaspoonful of
frit or gerstley borate to a jar of CC underglaze for glossier color. Other
color possibilities include washes of the common colorants (mix chrome and
rutile 50/50 with gerstley borate or frit).
A thin red iron or red earthenware slip or possibly a red terra sigillata
on the foot or other exposed clay areas makes a nice contrast if used on a
white clay body. Other color possibilities for this glaze: A nice dark blue
green with: 2% cobalt carb + 3% chrome oxide + 2% black iron oxide added to
the glaze.

Possible Health Hazards:
Flint: free silica-wear a NIOSH approved dust mask when handling dry material

Estimated thermal expansion: 66.23 x10-7 /deg. C

Unity Formula for Midrange Majolica 96:
0.074 K2O 0.421 Al2O3 5.354 SiO2
0.257 Na2O 0.100 B2O3 0.001 TiO2
0.590 CaO 0.002 Fe2O3 0.249 ZrO2
0.079 MgO 0.000 P2O5 12.7:1 Si:Al Ratio

Percentage Analysis for Midrange Majolica 96:
69.65 % SiO2
9.30 % Al2O3
1.50 % B2O3
1.51 % K2O
3.45 % Na2O
7.17 % CaO
0.69 % MgO
0.07 % Fe2O3
0.02 % TiO2
6.65 % ZrO2



Richard Burkett - School of Art, SDSU, San Diego, CA 92182-4805
E-mail: richard.burkett@sdsu.edu <-> Voice mail: (619) 594-6201
Home Page: http://rohan.sdsu.edu/dept/rburkett/www/burkett.html
CeramicsWeb: http://art.sdsu.edu/ceramicsweb/
HyperGlaze@aol.com & http://members.aol.com/hyperglaze/

Merrill Rush on tue 25 may 99

Hi,Sharon-----
I have been saving this posting until I had time to reply.Yes,I am interested
in the Pinnell glazes.I am just starting to mix glazes and want a variety of
^6 recipes to test in my kiln,with my clay body(soft brown stoneware).Any and
all recipes will
be appreciated.
Merrill

Gayle Bair on wed 26 may 99

Hi Merril,
If you get any responses to this posting will you share them with me?
Thanks,
Gayle Bair
gaylebair@earthlink.net
----------------------------Original message----------------------------
Hi,Sharon-----
I have been saving this posting until I had time to reply.Yes,I am interested
in the Pinnell glazes.I am just starting to mix glazes and want a variety of
^6 recipes to test in my kiln,with my clay body(soft brown stoneware).Any and
all recipes will
be appreciated.
Merrill