Practice question · True or false
The division lines of a piece mould can be placed anywhere, since the seams are cleaned off the cast afterwards.
Hints
- Ask how many casts a mould makes and what each one inherits.
- Every cast carries the seam, and cleaning it is hand work every time.
Show the answer
False
Why
False, and it is the most expensive assumption in mould-making. Every cast the mould ever produces carries the seam, and cleaning it is hand work on each one, so the lines are placed along an edge, in a shadow, or where the form changes direction anyway. A badly placed seam is permanent, on every positive.
Practise Moulds I: Typology
The app has 5 more questions on this lesson, and keeps your place in the course. Sculpture I is free to start.
More questions on Moulds I: Typology
- Sort each mould by how it deals with undercuts.
- Why does a flexible silicone mould usually need a rigid mother mould over it?
- Addition-cure silicone can be prevented from curing by contact with sulphur-containing plasticine.
- Which are true of alginate as a moulding material?
- Complete the mould vocabulary.
- What is the minimum number of rigid mould pieces needed for a form with no undercuts at all?
- A waste mould resolves undercuts by destruction rather than division or stretching. What does this principle…
- Arrange the steps of deciding how to mould a form, in order.