Another detailed tutorial from David part 2 on making casts in open or closed moulds.
“My own ‘making’ encompasses sculpture, model-making, painting, graphic work and design. My ‘teaching’ involves undergraduate or post-graduate lecturing/tutoring both here (England) and abroad; running my own short courses, whether independently or hosted by institutions; writing instructional books and articles. I am, for example, author of the (fairly successful) book Model-making: Materials and Methods”
This follows on from the previous post in which I mentioned that hollow casts can be made in ‘closed’ moulds i.e. without having to set up a pouring hole. The cast is achieved in exactly the same way as the puppet head .. by building up a sufficiently thick layer in both halves of the mould, then joining them together. In fact it can even be a little easier since the two mould halves often have a consistent rim to work up to. This method of casting is a big advantage when the prototype form offers no convenient area for setting up a pouring hole, as is the case with the form below.
Sue Auty moulded this lightbulb while participating in our Modelling, mouldmaking and casting course in 2012. She wanted to preserve the distinctive shape of the contacts at the base, which would have to be remodelled if this area were cut…
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