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Year 10 - Art and design

3D Design: plaster casting

3D Design

Unit Summary

This is a teacher led unit which introduces to pupils to the skills within their endorsements. Through a series of workshop activities, students experiment with a range of materials and techniques. They develop a range of studies exploring mark making media, print and mixed media.

Lesson Summary

You will learn to experiment with three plaster casting methods and show how form, surface and construction interact.

Key Notes

  • When casting, plaster is poured directly over a model to create a mould.
  • When casting, the model is coated with a release agent to prevent sticking.
  • A mould can be created in two halves, allowing for more complex shapes.
  • Applying a thin layer of plaster (poured or brushed) to a model and building up several layers creates a solid shell.

Vocabulary To Learn

  • mould: a hollow form used to shape plaster
  • release agent: prevents plaster sticking to the model
  • casting: pouring a liquid material (like plaster) into a mould, where it hardens into the shape of the mould to form a replica

Common Mistakes To Avoid

  • I can just pour all the plaster at once and it will work.

3 Quick Questions (With Answers)

1. Explain the lesson in two key points.

When casting, plaster is poured directly over a model to create a mould. When casting, the model is coated with a release agent to prevent sticking.

2. What does this key word mean in this lesson? 'mould'

a hollow form used to shape plaster.

3. Correct this common mistake.

Mistake: I can just pour all the plaster at once and it will work. Correction: Plaster heats as it sets and pouring too much at once can trap air, cause cracks or damage the model. Layering ensures detail and structure.

More Lessons In This Unit

Browse all guides in the Year 10 Art and design guide library.