(2) BUILDING
Fig. 35. Making coils
Compared to the wheelwork the building appears simple at first, but experience will soon show that it too needs considerable practice. Though the actual process has not the glamor and thrill associated with wheelwork, there is a certain quality in a built vase which gives it a value of its own. Building is generally done nowadays by means of coils of clay (fig. [35]), which must be a little thicker than the walls of the vase are to be and should be as uniform as possible. To make the foot of the vase, the end of one of these coils is laid in the center of a plaster bat and the rest coiled round in spiral line. To hide the joints the surface is rubbed over with the fingers on both sides. In making the walls of the vase a coil is used for each round and the superfluous clay pinched off, every new coil being begun at a new point. The whole surface, inside and outside, is again smoothed by rubbing with the fingers, using very little water in the process. Only about three coils should be worked in at a time and then left to harden before new coils are added. In building up a certain shape it is best to use a templet of cardboard or plaster, to be sure that the profile of the vase is followed out correctly. To give the required finish at the end, modeling tools as well as further rubbing with the fingers are required.
With this process in mind it is easy to distinguish between built and wheel-made pottery among the Greek wares. In the built pottery, however careful the work, there is always a certain unevenness of outline—which indeed gives it some of its charm. Unlike the moderns, the Greeks did not continue to build pottery after the invention of the wheel. Naturally the general adoption of the wheel was not synchronous in all ceramic centers. It was used considerably earlier in Crete, for instance, than in Cyprus. But when once its convenience was thoroughly realized, the slower and more monotonous method was entirely dropped. Among Athenian black-figured and red-figured vases there are no built pieces.
(3) MOULDING
The process of moulding vases is the one most in use nowadays, for the simple reason that when once the required mould has been made the production of any number of vases is a rapid and easy task. But though commercially favored, this method is looked down upon by the artistic potter as being purely mechanical, and there is no doubt that a moulded vase has all the characteristics of machine work.
The material used for moulds nowadays is plaster. The clay can either be poured into a mould in slip form or pressed into a mould while soft and plastic. In the former process the mould or moulds are made in two or more pieces, which fit closely together leaving an opening at the top. By pouring the clay slip into the opening, leaving it to harden a little, and then pouring out again what has not hardened, a hollow vase is formed. After due shrinkage the mould is carefully removed from the vase (fig. [36]). The same mould can be used indefinitely for making vases of the same shape; it has only to be dried between one use and the next. Handles can be produced in the same way and then attached.
Fig. 36. Vase poured in a mould