FAQ

Questions usually arise when the planning of a product begins. Which body is frost resistant
and will survive winter in the garden? Can I still use the CREATON body that has been in the cellar for four months? The answer to these questions and others can be found here.

When is a piece of ceramic frost resistant?

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When is a piece of ceramic frost resistant?

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Whenever a fired piece of ceramic is to be put outside then it is needs to be frost resistant. If water can be absorbed by the piece , then the water will expand when it freezes which can cause the piece to crack or break. That`s why it is neccessary that the piece is fired until the surface is non-porous , which means - not able to absorb water. The absorbtion should be less than 2%.

How can the water absorbtion be tested?

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How can the water absorbtion be tested?

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A fired, dry and unglazed test piece, at least 5cm x 5cm, is weighed. Then it is put in a cooking pot and completely covered by water. The water is then brought to the boil. Thereafter, it is left to soak for 24 hours. After which, it is removed and the drops of water on the test piece are wiped away with a sponge. The test piece is then weighed again. The difference in weight is the water absorbtion. This value in relation to its dry weight is a percentage, e.g. 48.5g dry, 49g wet is an absorbtion of 0.5g, divided into 48.5g and mutliplied by 100g, results in 1.0% water absorbtion.

At what temperature does my clay body become non-porous?

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At what temperature does my clay body become non-porous?

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Each body has a certain firing range. During the firing the ceramic becomes less and less porous with increasing temperatures. Ceramic is classed as non-porous when it absorbs less than 2% water. The porousity can be tested with the previously mentioned water absorbtion test.

How long can I store CREATON-bodies?

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How long can I store CREATON-bodies?

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The CREATON bodies can be stored for up to 1 year in the original undamaged packaging.
To achieve this, they should be stored in dark, cool and frost free conditions - ideally + 5 °C to + 18 °C.

The red and black CREATON-bodies have harderned, what can I do?

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The red and black CREATON-bodies have harderned, what can I do?

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The coloured bodies tend to harden faster with time however, if you knead them thoroughly, they will regain their original consistancy.

Why does the body become mouldy and what effect does this have on the quality?

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Why does the body become mouldy and what effect does this have on the quality?

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Clay is a product of nature which naturally contians organic matter. In damp conditions and in plastic bags, the natural organic componant of the body begins to rot and as a result mould / algae forms. This is known as aging and actually improves the plasticity of the clay. Bodies that rot and form mould or algae are clays of high quality and very plastic. If your clay is mouldy or has algae, simlply knead the clay well before using it.

FAQ

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