AUSCRAFT SLIP RECIPE
February 2009
|
|
Recipe |
|
|
minimum |
maximum |
|
Powdered Clay |
25 kilos |
25 kilos |
|
Water |
10 litres |
11 litres |
|
N42 Sodium Silicate |
80
gm (60 mL) |
80 gm (60 mL) |
Dispex N40 |
1gm (0.7mL) |
5 gm (3.5mL) |
|
litres of slip produced |
19 to 20 |
|
aim litre weight/grams per litre |
1725 |
|
biscuit |
1060-1100°C Orton Cone 04 to 03 |
|
glost |
1000-1060°C Orton Cone 06 to 04 |
Recommended Method
1. Add water to mixer
2. Add minimum Sodium Silicate N42 diluted 50/50 with warm
water.
3. Mix and put aside minimum Dispex N40 diluted 50/50 with warm
water.
4. Agitate mixer as you add some of the clay. The slip will
gradually thicken.
Add a small amount of Dispex N40 mixture to maintain fluidity. Then add more clay.
Continue this process until all the clay is in the mixer and a
smooth creamy consistency is obtained.
The maximum amount of Dispex N40 should not have been needed to
this stage.
5. Check the litre weight.
If litre weight is higher than the aim, add water.
If litre weight is lower than the aim, add clay.
For accurate litre weight measurement ,contact Walker Ceramics
for a Litre Weight Bottle and calculation chart (Product Code HC80).
6. Mix for 1 hour (more for multi bag mixes) then check if
more Dispex N40 mixture is required for pouring fluidity.
7. Allow slip to mature for 24 hours.
8. Reblend.
9. Sieve through an 80 mesh screen before use.
For multi bag mixes proceed as above but leave addition of
Dispex N40 until final adjustment.
In all our slip recipes we recommend that the maximum amount of Sodium Silicate
is not exceeded.
Before making any adjustments make sure the litre weight is within the stated
limits for the body.
AUSCRAFT WITH TERRA COTTA CONCENTRATE SLIP
RECIPE
| |
minimum |
maximum |
|
Auscraft Powdered Clay |
25 kilos |
25 kilos |
|
Terra Cotta Concentrate |
2.5 kilos |
2.5 kilos |
|
Water |
13.2 litres |
14.5 litres |
|
N42 Sodium Silicate |
80 gm (60 mL)
|
80 gm (60 mL)
|
|
Dispex N40 |
10gm (7mL)
|
20 gm
(14 mls)
|
3. Add Sodium Silicate N42 diluted 50/50 with warm water.
4. Mix, in a separate container, the minimum Dispex N40 diluted 50/50 with warm water.
5. Agitate mixer as you add some of the clay.
The
slip will gradually thicken.
Add a small amount of Dispex N40 mixture to maintain
fluidity.
Then add more clay.
Continue this process until all the clay is in the mixer and
a smooth creamy consistency is obtained. The maximum amount of Dispex
N40 should not have been
needed to this stage.
6. check the litre weight
If litre weight is higher than the aim add water.
If litre weight is lower than the aim add clay.
7. Mix for 1 hour (more for multi bag mixes) then check if
more Dispex N40 mixture is required for pouring fluidity.
8. Allow slip to mature for 24 hours.
9. Re-mix for short time.
10. Sieve through an 80 mesh screen before use.
