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I am able to work from photographs but truly superior results are always obtained by working from life, particularly with portraits of people. The way it is done is that we arrange a series of sittings about two hours long, maybe weekly or two weekly. It usually takes somewhere between eight and twelve sittings for a good likeness to emerge and for it to come alive. Between sttings the clay is wrapped up and sprayed regularly with water so it doesn't dry out. When the portrait is finished, I make a mould of it and recycle the clay. From the mould, the sculpture can be cast into a variety of materials such as plaster, resin or wax (for bronze). If more than one cast is to be made or in order to make a wax for bronze casting, the mould will be made of flexible rubber with a plaster case. Flexible rubber is a very effective modern alternative to gelatine and horsehair or to the complex reusable plaster piece moulds of previous centuries. The idea is that the rigid plaster case can be made in as few pieces as is practicable. These are designed so they can be slid off the rubber quite easily. Once they are off, the flexible rubber pieces can be pulled gently away from all the details and undercuts in the sculpture without damaging it. They can then be fitted back into the rigid case so another cast can be made from the mould if necessary. Whatever material is used for the cast (plaster, wax or resin) it goes into the mould as a liquid. It might be poured in up to the neck of the mould and left to set or it might be painted in with a brush and built up to a suitable thickness in each piece separately. In this case the pieces would then be clamped together and more of the liquid would be poured in and out again leaving the seams joined. If it is possible to reach all of the seams by hand from the inside they can be painted in with a brush. |
Marina Graham: Sculpture and Imagery |
Elizabeth Starkey aged 14 : Resin with marble dust, lifesize. |
NB students: When designing a mould it is necessary to anticipate how each subsequent stage of the casting process will be carried out in order not to leave oneself with an impossible job! The casting of sculptures requires skill, patience and foresight and is a great discipline for the artistic temperament. It can be fun though, to see who can come up with the most interesting complication. The pathology of bronze casting can provide hours of entertainment. Always bear in mind that fits of fury rarely help and only serve to amuse one’s colleagues or fellow students. See my other portrait pages for more portraits in these various materials. |