Potter's wheel


An artisan throwing pots on an electric potters wheel

The potter's wheel is a machine used in the shaping of round ceramic wares. Occasionally, it is also known as a "potter's lathe," however this is actually a different machine used for a shaping process—or turning—which is similar to shaping metal and wood pieces. The potter's wheel may also be used during the process of trimming excess clay from dried wares and for applying incised decoration or rings of color.

Contents

The techniques of jiggering and jolleying can be seen as an extension of the potters wheel. In jiggering, a shaped tool is slowly brought down onto a plastic (semi-dried) clay body that sits atop a rotating plaster mold. The jigger tool shapes the top face as it molds the underneath one. The term is specific to shaping of flatware. A similar technique, jolleying, refers to the production of holloware: Cups or bowls (having a symmetrical, hollow center).

The head of an electric potters wheel after throwing a pot

History

A potter molds pottery with his hands while operating the mechanical potter's wheel with his foot, 1902.

Many early ceramics were hand-built using a simple coiling technique in which the clay body was rolled into long coils that were then pinched and beaten together to form the body of a vessel. The artist had to turn the vessel around in order to wind the coils along the top of the piece, increasing its height with every complete turn.

In the coiling method of construction, all of the energy required to form the piece is supplied directly by the hands of the potter. This changed with the introduction of the potter's wheel. The heavy stone wheel was initially kicked or turned with a stick, and then continued to turn based on its own momentum. In wheel-throwing, the bulk of the energy used does not come directly from the hands of the potter but from the turning wheel. The introduction of the potter's wheel brought benefits in the form of speed, symmetrical shape, and efficiency, as a job that might have taken hours or even days to complete was reduced to one that could be done, with practice, in minutes.

Early ceramics built by the coiling technique were often placed on mats or large leaves to allow them to be worked and turned more conveniently. This arrangement allowed the potter to turn the mat rather than walk around the vessel to add coils to the clay body. It has been theorized that the earliest forms of the potter's wheel were developed as an extension to this procedure. The earliest wheels were thus probably turned slowly by hand or by foot while coiling a pot, but later developments allowed energy in the momentum of a kick wheel to be used to speed up the process of throwing.

The relatively unrestricted momentum of the kick wheel enabled more efficient use of the potter's energy.

It is not known when the potter's wheel first came into use, but dates between about 6,000 B.C.E. to about 2,400 B.C.E. have been suggested. Many modern scholars suggest that it was first developed in Mesopotamia, although Egypt and China have also been claimed as possible places of origin. A stone potter's wheel found at the Mesopotamian city of Ur, in modern-day Iraq, has been dated to about 3,000 B.C.E., but fragments of wheel-thrown pottery of an even earlier date have been recovered in the same area. By the time of the early civilizations of the Bronze Age, the use of the potter's wheel had become widespread.

In the Iron Age, the potter's wheel in common use had a turning platform about a meter above the floor, connected by a long axle to a heavy wheel at ground level. This arrangement allowed the potter to keep the turning-wheel rotating by kicking the wheel with the foot, leaving both hands free for manipulating the vessel under construction.

Use of the potter's wheel became widespread throughout the Old World, but was unknown in the Pre-Columbian New World, where pottery was hand-made by methods that included coiling and beating.

The use of the motor-driven wheel has become common in modern times, particularly with craft potters and educational institutions, although human-powered ones are still in use and are preferred by some potters.

Techniques of throwing

A simple animation of throwing on a potters wheel.

There are many techniques in use for throwing pots, although a typical procedure is:

  1. Put a round, moist ball of clay body down onto the bat (batterboard) with a little water or small amount of clay smoothed over the area to hold it in place
  2. Center the clay body on the wheel by applying pressure with a wet hand on one side and the other hand on the top, allowing the clay to pass through the hands. An alternative to this is to 'pull' the clay body up and down until it is centered
  3. Find the center of the clay by moving a thumb or finger across the clay until no more friction is felt as it turns
  4. Push thumbs into the center of clay body. Stop at about 1/4 inch from the base
  5. Widen the inside of the clay body using both hands and perhaps a tool
  6. Pull up sides by crossing wet thumbs at the top with fingers on either side of the wall and slowly, slowly pulling up.
  7. Shape the vessel by pushing in or pulling out
  8. Round the lip, using a sponge or a piece of leather/chamois
  9. Cut the pot from the bat by sliding a toggle or cheese wire underneath the base of the pot to separate it from the bat
  10. Dry the pot until it is leatherhard
  11. Trim the base using a carving tool
Classic potter's kick-wheel at Erfurt, Germany


By using the Coil and Throw technique, it may be possible to throw larger pots, commonly up to four feet high. This requires more clay body, and generally greater skill:

  1. Follow steps 1-7 in previous list
  2. A blowlamp can be used to dry/firm the base. This allows larger coils to be added without fear of the pot collapsing
  3. Add coils to the lip as the wheel is slowly turning
  4. Smooth the coil to join with the pot
  5. Repeat step 4 as needed
  6. Smooth the lip with a chamois or by hand
  7. Cut the pot from the bat with a wire
  8. Allow the pot to get leatherhard
  9. With great care, reverse the pot on the wheel, secure and trim the foot (base)

The potter's wheel in literature

1568 German print of a potter throwing clay on a wheel

In Ancient Egyptian mythology, the god Chnum was depicted as forming the first humans on a potter's wheel.

The way in which a clay body is shaped on a potter's wheel seems, even today, to have a magical quality to it; the clay body has the appearance of being a living thing that is being created or shaped by the potter. The potter and clay have long served as a metaphor for creation, and for the relationship of God to humankind:

But now, O Lord, thou art our father; we are the clay, and thou our potter; and we all are the work of thy hand.
—Isaiah 64:8

The "Rubaiyat of Omar Khayyam" makes sustained use of this metaphor. In FitzGerald's translation, a number of quatrains are collected into a Book of Pots, in which the pots engage in theological speculation:

  And, strange to tell, among that Earthen Lot
      Some could articulate, while others not:

  And suddenly one more impatient cried—
      “Who is the Potter, pray, and who the Pot?”

  Another said—“Why, ne'er a peevish Boy,
       “Would break the Bowl from which he drank in Joy;
  “Shall He that made the vessel in pure Love
      “And Fancy, in an after Rage destroy?”

  None answer'd this; but after Silence spake
      A Vessel of a more ungainly Make:
  “They sneer at me for leaning all awry;
      “What! did the Hand then of the Potter shake?”

Crankshaft

French pottery manufacturing using a wheel, 1864

Ancient potters often used a stick to rotate the wheel, or an apprentice or servant would use the stick to turn the wheel as the artisan worked.

The simplest way to spin the potter's wheel by foot is to sweep the foot from one side to the other against the spinning hub causing it to turn in one direction. From an ergonomic standpoint, this is rather awkward as only one leg is used in this process, much like driving a car using only the right foot, causing an imbalance in the muscles of the body. Yet the rhythm of the wheel turning on the kick wheel is an integral part of the balance and throwing of the pot, many weekend potters still use the traditional kick wheel for throwing clay for its link to early potters.

Another solution which was invented at an unknown time was to have a crankshaft with a lever, that converts up and down motion into rotary motion. Sewing machines such as those pioneered by the Singer Corporation have manual models operated by this method.

Electric vs. kick wheels

Potter's wheel and tools

Modern potters tend to use the electric style of wheel, as it gives consistent turning with little effort. Most wheels have several speeds at which to work, usually the foot presses down on an "accelerator" or foot plate to control the speed of the wheel head. Electric wheels also tend to be smaller than kick wheels.

Electric wheels need only a small stool or other place to sit to work on the wheel. Additional parts may be added, such as a shelf for tools, water, sponges, and so on. Different heads may be added to some of the electric wheels, making it easy to just add a new head and continue throwing while the previous pot dries on the last head. For wheels without interchangeable heads, a small bat may be attached to the wheel head with bolts or just several balls of clay.

However, the contemporary kick wheel is still a favorite for some potters who shun the electric wheel's mechanized feel and somewhat noisy electric motors. The kick wheel also allows the potter to feel more of the rhythm of creation of a pot and the silence of the kick wheel allows a more "zen" sense of consciousness for the potter.

References

  • Barnett, William & John Hoopes, eds. The Emergence of Pottery. Washington: Smithsonian Institution Press, 1995. ISBN 1560985178
  • Birks, Tony. The Complete Potter's Companion. Bulfinch Press Book: Little, Brown and Co., 1993. ISBN 0821224956
  • Childe, V. G. Man Makes Himself. London: Watts & Co, 1951.
  • Hamer, Frank and Janet Hamer. The Potter's Dictionary of Materials and Techniques. London: A & C Black Publishers, 1991. ISBN 0812231120
  • Hluch, Kevin. The Art of Contemporary American Pottery. Krause Pub., 2001. ISBN 0873419065
  • Hopper, Robin. Advanced Throwing on the Potters Wheel Extended and Altered Forms. DVD video, 1995.
  • Kirkpatrick, Christian. "Potteries of Staffordshire." British Heritage. Retrieved September 4, 2007.
  • Rado, P. An Introduction to the Technology of Pottery. Pergamon Press, 1988. ISBN 0080349307
  • Rice, Prudence M. Pottery Analysis—A Sourcebook. Chicago: University of Chicago Press, 1987. ISBN 0226711188
  • Utz, George Jacob. The Potters Wheel from Past to Present. Dissertation: Thesis (M.F.A.)—Ohio State University, 1972.
  • Warshaw, Josie. The Practical Potter. Anness Pub. Ltd., 2002. ISBN 1843092069

External links

All links retrieved May 27, 2015.

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