Pottery

Pottery is the process and the products of forming vessels and other objects with clay and other raw materials, which are fired at high temperatures to give them a hard and durable form. It is one of the oldest human inventions, with the earliest known pottery vessels discovered in Jiangxi, China, dating back to 18,000 BC. Pottery can be found in many places around the world, including Jōmon Japan, the Russian Far East, Sub-Saharan Africa, South America, and the Middle East.

Pottery is made by forming a clay body into objects of a desired shape and heating them to high temperatures in a bonfire, pit, or kiln. This process makes the objects strong and rigid. Pottery can be purely utilitarian, but some pieces are also regarded as ceramic art. It can be decorated before or after firing, and there are different types such as earthenware, stoneware, and porcelain.

Ceramic vessels have been used for cooking since ancient times because they retain heat well and distribute it evenly. Unlike metal, ceramics emit far-infrared radiation that cooks food deeply. Different types of pottery, like porous earthenware and vitrified stoneware, are used for specific cooking needs, ensuring flavor purity and durability.

Main types

Main article: Earthenware

Main article: Stoneware

Main article: Porcelain

Pottery comes in many types, mainly divided into earthenware, stoneware, and porcelain. Earthenware is the oldest type, made from clay fired at low temperatures. It was often used for simple, hand-formed items and can be porous unless glazed. Stoneware is fired at higher temperatures, making it stronger and non-porous. It has been especially popular in places like China, Japan, and Germany. Porcelain is the strongest and most beautiful type, made at the highest temperatures. It was first created in China and later in Korea and Japan.

Archaeology

The study of pottery helps us learn about ancient cultures. By examining the materials, designs, and decorations of pottery, archaeologists can understand the skills, habits, and technologies of past peoples. For example, similar pottery styles often indicate shared cultures, while differences can show trade or cultural exchanges.

Pottery is durable and often survives long after other items have decayed, making it a key source of information for archaeologists. By analyzing pottery, we can learn about a society’s organization, daily life, and beliefs. The way pottery is made and decorated can also reveal how different groups interacted and shared ideas.

Clay bodies and raw materials

Body, or clay body, is the main material used to make pottery. Potters can use different types of clay bodies such as earthenware, stoneware, or porcelain, each with its own properties like plasticity and strength before and after firing.

The main ingredient in pottery is clay, and there are several types used, including kaolin (also called china clay) for porcelain, ball clay for its plasticity, and fire clay for high heat resistance. Other materials mixed with clay include feldspar, which lowers the temperature needed to harden the pottery, and quartz, which helps reduce shrinkage during drying.

Production

The production of pottery includes several important stages. First, the clay must be prepared, which might involve kneading to make sure the moisture is even. Air trapped in the clay is removed, either by a machine or by hand. Once the clay is ready, it is shaped using different methods.

One common way to shape clay is by hand-building, where pieces are made from coils, flat slabs, or by pinching. Another method is using a potter’s wheel, where a ball of clay is spun and shaped into a hollow form. Other techniques include press moulding, granulate pressing, and using machines like jiggering and jolleying, which help make flat and hollow pieces quickly. There are also methods like slip casting, where liquid clay is poured into a mould, and injection moulding, which is used for making complex shapes.

Before firing, the pottery needs to be dried. This can happen in different stages, from being slightly moist (called plastic) to being almost completely dry (bone-dry). Drying removes moisture so that the piece is ready for the next step.

Firing is when the pottery is heated to very high temperatures, which makes it hard and permanent. Different types of pottery are fired at different temperatures, and the atmosphere inside the kiln (whether it has lots of oxygen or not) can change the colors of the pottery. There are many ways to fire pottery, using different fuels like wood, coal, gas, or electricity.

Pottery can also be decorated in many ways. Painting, glazing, carving, and burning the surface are all popular methods. Glazes protect the pottery and can add color and a shiny finish. There are special techniques like using salt or ash to create unique glaze effects.

Overall, pottery is made by preparing clay, shaping it, drying it, firing it, and then decorating it. Each step is important to create the final piece.

History

Main article: Ceramic art § History

Pottery has a long history that goes back to prehistoric times. Because pottery lasts a long time, we learn a lot about ancient people from the pieces we find. Many early cultures are named for the pottery they made.

Before people started making pottery, a few things needed to be true. There needed to be clay nearby, a way to heat the clay very hot, and a reason to make pottery. Some of the earliest pottery was found in China and the Czech Republic.

Early pottery was often made by hand, using methods like pinching and coiling. The first way to fire pottery was using bonfires. Over time, new tools like the potter's wheel made pottery production easier. Different kinds of kilns were developed to fire pottery at higher temperatures.

Pottery developed in many parts of the world, often separately. In East Asia, Japan is known for Jōmon pottery with rope designs, and China developed fine porcelain. In South Asia, early pottery was found in India, and in Southeast Asia, each group had its own pottery traditions.

In West Asia, pottery began around 8000 BC. The invention of the potter's wheel made pottery easier to produce. In Europe, early pottery was found in Russia, and later in places like Greece and Rome.

In the United Kingdom, the city of Stoke-on-Trent became famous for its pottery, led by Josiah Wedgwood. In Arabic pottery, new techniques like lusterware were developed. In the Americas, Native American cultures developed their own pottery traditions. In Africa, some of the oldest pottery in the world was found. In Oceania, pottery was used by cultures like the Lapita, but not by Indigenous Australians.