practical information casting slips casting powders specifications plastic clays gradient firings | | Walker Ceramics has a range of powders suitable for casting.
They are available in 25 kgs bags.
Preparation of casting slip from powder involves only the addition of measured amounts of
water and deflocculents in a suitable mixer.
When purchasing pallet lots of our casting powders a current recipe will be
attached to the outside - underneath the plastic wrapping. The colour
of the paper this recipe is printed on is an indication of the current
deflocculation recipe. Due to occasional slight variations in Australian raw
materials, the required amounts of water and deflocculents can vary. If the colour of this recipe
changes you will be able to see at a glance the variation of the recipe from
your last delivery. Use this change as a guide to alter your own existing recipe.
Our recipes are issued as a guide only, as water and local casting conditions
may vary around Australia. Follow the recipe mixing instructions to attain the
best possible casting slip from your mixer. Slip should be run through an 80
mesh sieve prior to use to ensure the highest quality results.
Check the litre weight using Walker
Ceramics Litre Weight Bottle and
Chart for accuracy (Product Code HC80).
Always use our slip mixing records and charts for permanent historical records
of slip recipes and solutions to mixing
problems.
We strongly recommend that casting slips should be tested for suitability
prior to any bulk use. Slips may be coloured with the addition of stains suitable for
clay bodies.
No.10 Stoneware (AB100)
Fires between 1240-1300°C. Excellent
glaze colour development on this white body. It is suitable for both Middle Fire
and Stoneware glazes.
White Earthenware/Middle Fire (AB300)
The body should be biscuit fired at
1000°C (minimum) and then appropriately glazed and fired from 1060 - 1250°C. This
will cover the full range of our standard Earthenware and Middle Fire glazes. Available in 25 kg bags.
CB1 (AB400)
This body
has excellent pouring and working properties and high green strength.
Fires white.
Biscuit at 1060 to 1100°C Orton Cone 04 - 03.
Glost to 1000 - 1060°C Orton Cone 06 - 04.
Suits all Hobby Ceramic Glazes and our Earthenware Containing Fritted Lead
Glazes. Especially EE400 Clear Gloss.
Auscraft Ultra White (AB450)
This body has excellent pouring and
working properties and high green strength. Fires to Ultra
White .Biscuit at 1060 to 1100°C Orton Cone 04 - 03 .
Glost to
1000 - 1060°C Orton Cone 06 - 04.
Suits all Hobby Ceramic Glazes and our Earthenware Containing Fritted Lead
Glazes. Especially WHG400 Clear Gloss.
Vitreous China (AB475)
**** NEW
****
This body has been designed for the people
who want Porcelain / Stoneware strength with the brightness of Earthenware
colours at Earthenware temperatures.
Biscuit
at 1000 to 1060°C Orton Cone 06 - 04 .
Glost to 1150 - 1170°C Orton Cone
1- 3.
Suits our range of VITREOUS CHINA glazes.
Terra Cotta Concentrate (AB406)
Add to standard Earthenware
bodies to fire to a beautiful rich red terra cotta
colour.
Fires from 1000°C - 1100°C.
TECHNICAL DATA
|
|
|
Oxidised Conditions |
|
|
|
|
Body |
Shrinkage % @ º C |
Water absorb % |
Fired Colour @ °C |
Vitrified Temp °C |
Suggested Temp °C |
| Imperial
Porcelain 4317 |
9.9@1280 |
<2.0 |
White |
1210 |
1280-1300 |
|
Superior White Porcelain |
10.2@1300 |
<2.0 |
White |
1220 |
1280-1300 |
|
No. 10 Stoneware |
12.5@1300 |
<0.5 |
Grey White @1300 |
1260 |
1240-1300 |
|
White Earthenware / Middle Fire |
2.8@1060 |
16 |
White @1060 |
1250 |
1060-1250 |
|
|
8.8@1250 |
1 |
Grey White @1250 |
|
|
|
PB103 Fine White Stoneware |
12.8@1300 |
0 |
White @1300 |
1260 |
1240-1300 |
|
Vitreous China |
9@1160 |
0 |
White @1170 |
1170 |
1150-1170 |
|
Bone China |
5@1225 |
0 |
Ultra White @1250 |
1250 |
1225-1250 |
|
Auscraft Ultra White |
3.6@1100 |
12 |
Ultra White @1100 |
- |
1000-1100 |
|
CB1 |
5.2@1060 |
13 |
White @1060 |
- |
1000-1100 |
|
Limoges French White 97975 |
13.0@1220 |
<0.5 |
White |
1230 |
1220-1240 |
|
Limoges Porcelain CM10 |
12.0@1280 |
<0.5 |
White |
1240 |
1220-1280 |
|