Milton Markey on mon 3 jul 00
Hi!
After seeing a collection of ancient Turkish and Middle Eastern ceramic art
in a museum recently, I came upon some "fritware" which was on display. I
wonder if someone on the list can tell me what fritware is. Is it possible to
make fritware, with contemporary ingredients?
Thanks!
Happy July 4, everybody!
Milton NakedClay@AOL.COM
Khaimraj Seepersad on tue 4 jul 00
Hello to All ,
Milton ,
Fritware , can be sand , a bentonite clay / bentonite , and frit / cullet /
crushed glass .
The formula's vary - 1 part clay , 1 part frit and 10 parts sand .
or what ever of the above is plastic enough to do what you want to
do .
The glaze can be purely alkaline , for that water clear look , partially
lead based or partially boric oxide based .
Usually , there is a slip applied to the object , before applying the
glaze . The slip was either pure crushed quartz , suspended by flour ,
bentonite , whatever , or a combination of , once again - clay , frit and
sand [ crushed quartz ] .
The idea is a body , that has a high enough expansion to allow the
Alkaline Glaze to fit [ Seljuc ] . Or if your Iznik , a touch of lead ,
will allow for lower firing [ 900 deg.c ] , and a better fit .
See also Gombroon Ware .
Egyptian Paste is a Frit ware as well and some Roman Work
This works best for me -
50 crushed quartz [ -200 mesh ] Fired to 983 deg.c but can easily
30 glass cullet make 1200 deg.c +
20 very plastic clay or bentonite [ white firing ]
At high temperatures , the body will appear to be translucent , but will
still be porous .
A glaze to try -
Raw Alkaline Glaze [ Non Toxic ] - free Soda Ash is Caustic !
28 Soda Ash fire to 950 - 983 deg.c
10 CaC03
51 Feldspar - I use NC4
11 Si02
Grind the Soda Ash finely [ it is caustic , don't breathe the dust or get
it into your eyes - but it is not toxic - just don't eat it ]
**** You must use Rubbing Alcohol as your liquid , a little bentonite will
help - up to 6 % .
I apply the glaze with a brush .
You can substitute - SrC03 , or Mg0 , or Talc [ note the silica ] for the
CaC03, as well as Dolomite . Using Ti02 will also work , in place of the
CaC03 , the glaze will then take on a brighter than Diamond Lustre , as
well as becoming much more stable .
Raise the firing temperature if need be .
If you find cracks in the glaze , either use less cullet in the body , or
fire
a bit lower . This will keep the crushed quartz or sand's high expansion
qualities .
Opacify with , Zircopax , Zirconium oxide , Titanium Dioxide , or Tin Oxide.
With small quantities of Iron Oxide , reduction will yield Celadon , many
types of green .
Happy adventures .
Khaimraj
* As usual , Si02 should not be breathed , mix the body in a large plastic
bag , remember your mask .
For decoration use a commercial enamel from say - Thompsons Enamels.
-----Original Message-----
From: Milton Markey
To: CLAYART@LSV.CERAMICS.ORG
Date: 04 July 2000 7:43
Subject: Definition of Fritware
>Hi!
>
>After seeing a collection of ancient Turkish and Middle Eastern ceramic art
>in a museum recently, I came upon some "fritware" which was on display. I
>wonder if someone on the list can tell me what fritware is. Is it possible
to
>make fritware, with contemporary ingredients?
>
>Thanks!
>
>Happy July 4, everybody!
>
>Milton NakedClay@AOL.COM
>
>___________________________________________________________________________
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>Send postings to clayart@lsv.ceramics.org
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melpots@pclink.com.
>
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