Potclays Low Temp Casting Slip 10lt 1040-1140c
A reformulation of our popular Potclays White casting slip, owing to a forced change in talc supply as a result of mine closure.
This low temperature slip fires more yellow than Potclays White, but still offers good glaze fit with US glazes such as Mayco.
Main image: Test tiles fired at cone 05 (approx. 1030c), 02 (approx. 1100c), and cone 1 (approx. 1140c).
- Supplied in a 10lt lidded bucket
- High-talc US-style earthenware hobby casting slip
- Manufactured in the UK as an alternative to US-made casting slips
- Potclays White casts quickly and produces firm greenware
- Recommended firing range 1040-1140C but recommended biscuit temperature is 1060C
- Produced to a Pint Weight of 34.5 to 36oz/Litre Weight of 1,721 to 1,796gm
Our casting slips are manufactured to a specific gravity of 1.7-1.8 and are correctly deflocculated ready for use. They will thicken on standing/in storage but thin again when brought to ambient temperature and mixed thoroughly (thixotropy). However, bear in mind that deflocculant will gradually lose its electrical charge over a period of time resulting in loss of efficacy. This process is accelerated by changes in temperature, and stoneware slips with a higher clay content are most affected. This is an industry-acknowledged issue affecting all casting slips regardless of manufacturer, but it can be easily remedied by adding 3-5 drops of Sodium Dispex per 5lt of casting slip and mixing thoroughly with an electric mixer, such as a drill with paint mixer attachment. If you do not already have Sodium Dispex in your workshop, we would recommend you order a small amount at the same time as your casting slip.