Sculptor Pete Laster demonstrates how to make moulds using alginate for casting delicate objects. He explains that alginate is a compound used by dentists to make moulds of teeth. He shows his own alginate mould of a cabbage leaf and the resulting final piece which has been painted. He highlights the level of detail possible using this material. He demonstrates how to mix the alginate and creates a mould of a cake using a box.

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Bitesize Clips

Students could collect various organic materials around the school, such as bark, leaves, flower petals (anything with textural detail that seems particularly interesting to them). They could then create a mould of their favourite object using alginate as demonstrated in the clip. This could be used for the creation of sculpture based on realistic representation. Alternatively, students could experiment with this technique to add particular textural elements to their work or to create permanent representations of temporal materials and objects.