casting powders
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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