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Slip Casting Questions

Slip Casting Questions

    What recipe should I use for making a casting slip from a powdered clay?

    Casting slip recipes vary depending on the clay, we recommend the following as a good...
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    Which deflocculant should I use when making my own casting slip?

    Sodium Silicate Na2SiO2 is the most popular deflocculant used in casting slips and has been...
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    Why is my casting slip thick and gloopy?

    Casting slips are thixotrophic so upon standing they can thicken. This is usually easily rectified ...
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    Why do my slipcast items have small pinholes on the outer surface?

    This is caused by air bubbles becoming trapped between the slip and the mould surface....
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    What's causing the horizontal lines around my slipcast ware?

    This is a fault known as ‘wreathing’ and is caused by the slip casting or...
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    Why are my casts brittle, difficult to fettle and difficult to handle?

    If your cast is very dense but low in strength due to the cast forming...
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    Why is my cast very soft (flabby) and distorts when handled?

    This problem is caused by either an under-addition of deflocculent, or by an excess of...
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    What’s causing the discoloured patch and thin-glazed area on the cast?

    This problem is known as ‘casting spot’. It is caused by the slip constituents separating...
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    Why are my pieces taking so long to cast?

    If you notice that the slip takes a much longer time to build up to...
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    Why is my casting slip so slow and difficult to drain from the mould?

    When the cast thickness has built up to the desired amount, it must be possible...
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    I have cast a large plate mould, but when opened, some areas have not formed a cast. What’s gone wrong?

    This is a common problem with ‘closed back’ plate moulds, and is caused by the...
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    Can I use hand-built add-ons on my slip cast piece?

    Even when casting slip is made from the same clay as the hand built pieces,...
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