How to make plaster head
• How to make plaster heads
You probably met often plaster head, copies of sculptures of ancient heroes and a famous historical figures. In addition to the aesthetic purpose they also have a direct purpose - it manuals for academic drawing. In contrast to the sitter, they do not move, do not ask for money, they are perfectly distributed lights, well, they can pose an infinitely ... They are often used, and photographers, to study light and shade, for example.
Drawing plaster head started quite a long time, at least since the late 18th century ... Filmed casts in museums or ordered from renowned sculptors blind copy. Then, in a limited number, do the casting is usually in the institution, or to order them at the same sculptors. Since that time, students and educational institutions clearly popribavilos, well, once there was demand, therefore, mass production should be.
Today I'll show you how we do it. We - a workshop "ekorshe" - we specialize in manufacturing of plaster models of training. In addition to plaster heads we produce geometric shapes, anatomical details, polukapiteli and others.
Many people think that the head of the plaster mold. In general, people who have no idea about the cast, deeply stuck opinion that plaster mold ... setting time of gypsum solution for 5-10 minutes. A phase when the solution is at least a bit like clay, and suitable itself for molding, lasts less than one minute. So that you can manage for a period of time? Therefore I reveal many secrets that all gypsum products is poured into special molds. Stucco else you can do by drawing, but in fact it is also a form, only mobile. They can be made of various materials, and plaster, too. We do form themselves from a special silicone compound. They are intended for mass replication. With such a shape obtained by 1000 copies. Briefly show the stages of creation.
The form is removed from a specially prepared models.
The model must have a perfectly smooth surface. To do this, we cover it with a special varnish.
Next, create a rigid frame. Oh, I forgot to say that the work is completely handmade. And each product keeps the warmth of our hands.
Then, between the model and the housing is filled with silicone.
The finished silicone mold looks like.
Or like this, two or three parts. It is interesting that when you look at a concave shape, a convex image you see.
But the halves of the mold in the housing. In the background forms for the other goals.
Creating a plaster head begins with a plaster solution. Recipe brilliantly simple: plaster and water.
Fill this mixture in a pre-assembled form.
Inside the form gypsum grasped practically forever, finding the shape of the head of the ancient hero. Alter, change something - it is no longer possible. In the process of setting gypsum is heated to 60-70 degrees Celsius.
But getting cast - that's not all. It still should bring to mind, remove burrs and polish at the joint shape.
Here's a close-up seam.
Further, all the products are sent to the dryer.
The drying process lasts for several days. Gypsum because only grasped quickly, dries and surprisingly long, depending on the product and the thickness of its walls, as well as ambient temperature and humidity. That is to compare products of different degrees of drying.
When the product is completely dry, lose up to half the weight and become pure white. Only in such a state, a final grinding of the seam.
When all steps are passed, the product is packed in stretch film to prevent dust and abrasions.
And this is how they look, for example, in one of the art shops in Moscow.