We may next take up the materials and the technical processes of
Greek sculpture. These may be classified as follows:
(1) Wood. Wood was often, if not exclusively, used for the earliest Greek temple-images, those rude xoana, of which many survived into the historical period, to be regarded with peculiar veneration. We even hear of wooden statues made in the developed period of Greek art. But this was certainly exceptional. Wood plays no part worth mentioning in the fully developed sculpture of Greece, except as it entered into the making of gold and ivory statues or of the cheaper substitutes for these.
(2) Stone and marble. Various uncrystallized limestones were frequently used in the archaic period and here and there even in the fifth century. But white marble, in which Greece abounds, came also early into use, and its immense superiority to limestone for statuary purposes led to the abandonment of the latter. The choicest varieties of marble were the Parian and Pentelic (cf. page 77). Both of these were exported to every part of the Greek world.
A Greek marble statue or group is often not made of a single piece. Thus the Aphrodite of Melos (page 249) was made of two principal pieces, the junction coming just above the drapery, while several smaller parts, including the left arm, were made separately and attached. The Laocoon group (page 265), which Pliny expressly alleges to have been made of a single block, is in reality made of six. Often the head was made separately from the body, sometimes of a finer quality of marble, and then inserted into a socket prepared for it in the neck of the figure. And very often, when the statue was mainly of a single block, small pieces were attached, sometimes in considerable numbers. Of course the joining was done with extreme nicety, and would have escaped ordinary observation.
In the production of a modern piece of marble sculpture, the artist first makes a clay model and then a mere workman produces from this a marble copy. In the best period of Greek art, on the other hand, there seems to have been no mechanical copying of finished models. Preliminary drawings or even clay models, perhaps small, there must often have been to guide the eye; but the sculptor, instead of copying with the help of exact measurements, struck out freely, as genius and training inspired him. If he made a mistake, the result was not fatal, for he could repair his error by attaching a fresh piece of marble. Yet even so, the ability to work in this way implies marvelous precision of eye and hand. To this ability and this method we may ascribe something of the freedom, the vitality, and the impulsiveness of Greek marble sculpture—qualities which the mechanical method of production tends to destroy. Observe too that, while pediment-groups, metopes, friezes, and reliefs upon pedestals would often be executed by subordinates following the design of the principal artist, any important single statue or group in marble was in all probability chiseled by the very hand of the master.
Another fact of importance, a fact which few are able to keep constantly enough in their thoughts, is that Greek marble sculpture was always more or less painted. This is proved both by statements in ancient authors and by the fuller and more explicit evidence of numberless actual remains. (See especially pages 148, 247.) From these sources we learn that eyes, eyebrows, hair, and perhaps lips were regularly painted, and that draperies and other accessories were often painted in whole or in part. As regards the treatment of flesh the evidence is conflicting. Some instances are reported where the flesh of men was colored a reddish brown, as in the sculpture of Egypt. But the evidence seems to me to warrant the inference that this was unusual in marble sculpture. On the "Alexander" sarcophagus the nude flesh has been by some process toned down to an ivory tint, and this treatment may have been the rule, although most sculptures which retain remains of color show no trace of this. Observe that wherever color was applied, it was laid on in "flat" tints, i.e., not graded or shaded.
This polychromatic character of Greek marble sculpture is at variance with what we moderns have been accustomed to since the Renaissance. By practice and theory we have been taught that sculpture and painting are entirely distinct arts. And in the austere renunciation by sculpture of all color there has even been seen a special distinction, a claim to precedence in the hierarchy of the arts. The Greeks had no such idea. The sculpture of the older nations about them was polychromatic; their own early sculpture in wood and coarse stone was almost necessarily so; their architecture, with which sculpture was often associated, was so likewise. The coloring of marble sculpture, then, was a natural result of the influences by which that sculpture was molded. And, of course, the Greek eye took pleasure in the combination of form and color, and presumably would have found pure white figures like ours dull and cold. We are better circumstanced for judging Greek taste in this matter than in the matter of colored architecture, for we possess Greek sculptures which have kept their coloring almost intact. A sight of the "Alexander" sarcophagus, if it does not revolutionize our own taste, will at least dispel any fear that a Greek artist was capable of outraging beautiful form by a vulgarizing addition.
(3) Bronze. This material (an alloy of copper with tin and sometimes lead), always more expensive than marble, was the favorite material of some of the most eminent sculptors (Myron, Polyclitus, Lysippus) and for certain purposes was always preferred. The art of casting small, solid bronze images goes far back into the prehistoric period in Greece. At an early date, too (we cannot say how early), large bronze statues could be made of a number of separate pieces, shaped by the hammer and riveted together. Such a work was seen at Sparta by the traveler Pausanias, and was regarded by him as the most ancient existing statue in bronze. A great impulse must have been given to bronze sculpture by the introduction of the process of hollow-casting. Pausanias repeatedly attributes the invention of this process to Rhoecus and Theodorus, two Samian artists, who flourished apparently early in the sixth century. This may be substantially correct, but the process is much more likely to have been borrowed from Egypt than invented independently.
In producing a bronze statue it is necessary first to make an exact clay model. This done, the usual Greek practice seems to have been to dismember the model and take a casting of each part separately. The several bronze pieces were then carefully united by rivets or solder, and small defects were repaired by the insertion of quadrangular patches of bronze. The eye-sockets were always left hollow in the casting, and eyeballs of glass, metal, or other materials, imitating cornea and iris, were inserted. [Footnote: Marble statues also sometimes had inserted eyes] Finally, the whole was gone over with appropriate tools, the hair, for example, being furrowed with a sharp graver and thus receiving a peculiar, metallic definiteness of texture.
A hollow bronze statue being much lighter than one in marble and much less brittle, a sculptor could be much bolder in posing a figure of the former material than one of the latter. Hence when a Greek bronze statue was copied in marble in Roman times, a disfiguring support, not present in the original, had often to be added (cf. Figs, 101, 104, etc.). The existence of such a support in a marble work is, then, one reason among others for assuming a bronze original. Other indications pointing the same way are afforded by a peculiar sharpness of edge, e.g., of the eyelids and the eyebrows, and by the metallic treatment of the hair. These points are well illustrated by Fig. 76. Notice especially the curls, which in the original would have been made of separate strips of bronze, twisted and attached after the casting of the figure.