A History of Porcelain
Porcelain, pronounced POUR suh lihn, is a type of ceramics highly valued for its beauty
and strength. It is often called china, or chinaware, because it was first made in China.
Porcelain is characterized by whiteness, a delicate appearance, and translucence (ability
to let light through). Because it is the hardest ceramic product, porcelain is used for
electrical insulators and laboratory equipment. However, porcelain is known primarily as a
material for high-quality vases and tableware, as well as for figurines and other
decorative objects. The type of porcelain that is used for such purposes produces a
bell-like ring when struck.
Porcelain differs from other types of ceramics in its ingredients and in the process by
which it is produced. Two common types of ceramics--earthenware and stoneware--are made
from a single natural clay, which is then fired (baked). In many cases, the object is
coated with a glassy substance called glaze. Firing at a low temperature produces
earthenware, a porous material. Earthenware can be made waterproof by glazing. Firing at a
high temperature produces stoneware, a hard, heavy material. Stoneware is nonporous
Unlike earthenware and stoneware, porcelain is basically made from a mixture of two
ingredients--kaolin and petuntse. Kaolin is a pure white clay that forms when the mineral
feldspar breaks down. Petuntse is a type of feldspar found only in China. It is ground to
a fine powder and mixed with kaolin. This mixture is fired at temperatures from about 2280
_F (1250 _C) to 2640 _F (1450 _C). At these extreme temperatures, the petuntse
vitrifies--that is, it melts together and forms a nonporous, natural glass. The kaolin,
which is highly resistant to heat, does not melt and therefore allows the item to hold its
shape. The process is complete when the petuntse fuses itself to the kaolin.
Kinds of porcelain
There are three main kinds of porcelain: (1) hard-paste porcelain, (2) soft-paste
porcelain, and (3) bone china. The differences between these types of porcelain are based
on the material from which they are made. This material is called the body or paste.
Hard-paste porcelain, which is sometimes called true porcelain or natural porcelain, has
always been the model and ideal of porcelain makers. It is the type of porcelain first
developed by the Chinese from kaolin and petuntse. Hard-paste porcelain resists melting
far better than other kinds of porcelain. For this reason, it can be fired at higher
temperatures. These hot temperatures cause the body and the glaze to become one. When
hard-paste porcelain is broken, it is impossible to distinguish the body from the glaze.
The proportions of kaolin and petuntse in hard-paste porcelain may vary. The porcelain is
said to be severe if the percentage of kaolin is high, and mild if the percentage of
kaolin is low. Most collectors of porcelain prefer mild porcelain because of its mellow,
satiny appearance. In comparison, severe porcelain may seem harsh and cold.
Soft-paste porcelain, sometimes called artificial porcelain, was developed in Europe in an
attempt to imitate Chinese hard-paste porcelain. Experimenters used a wide variety of
materials in their efforts to produce a substance that was hard, white, and translucent.
They eventually developed soft-paste porcelain by using mixtures of fine clay and
glasslike substances. These materials melt at the high temperatures used in making
hard-paste porcelain. For this reason, soft-paste porcelain is fired at lower temperatures
and does not completely vitrify--that is, it remains somewhat porous. Breaking a piece of
soft-paste porcelain reveals a grainy body covered with a glassy layer of glaze.
Although soft-paste porcelain was invented in imitation of true porcelain, it has merits
of its own. Most of it is creamy in tone, and some people prefer this color to pure white.
In addition, the colors used to decorate it merge with the glaze to produce a soft, silky
effect that appeals to many collectors.
Bone china is basically made by adding bone ash (burned animal bones) to kaolin and
petuntse. English porcelain makers discovered this combination of ingredients about 1750,
and England still produces nearly all the world's bone china. Though not as hard as true
porcelain, bone china is more durable than soft-paste porcelain. The bone ash greatly
increases the translucence of the porcelain.
A piece of porcelain is shaped on a potter's wheel or in a mold. After this stage, the
porcelain worker may decorate it by (1) surface modifications, (2) painting, or (3)
Surface modifications are achieved by incising (carving), perforating (poking holes), and
embossing (applying raised designs). A well-known method of embossing porcelain is to
apply a mixture of water and clay, called slip, to the item with a brush. Relief designs
(three-dimensional effects) are usually molded separately and then attached to the
Painting the porcelain surface may be done in several ways. One method is to use a colored
glaze, such as the famous Chinese celadon. This glaze is a soft gray-green color. Another
type of decoration is underglaze (designs painted on a piece before it is glazed). A deep
blue made from the metal cobalt is the most dependable color used for underglazing. Cobalt
blue has been widely used both in China and in Europe.
Paints that are applied over the glaze are commonly called enamels. A large variety of
enamel colors were perfected at an early period. Most of them are made from metallic
oxides, such as iron, copper, and manganese. Enamel colors require a second firing to make
Porcelain painting in Europe differed greatly from porcelain painting in China. Chinese
decorators separated each color from the next with a dark outline, but European artists
blended colors together with no separating line. In addition, Europeans used decorations
purely for their artistic value, but Chinese decorations were symbolic. For example, a
pomegranate design symbolized a wish for many offspring because a pomegranate has many
Transfer printing revolutionized the porcelain industry in 1756 by enabling workers to
decorate wares much faster than they could by hand. In this process, a design is engraved
on a copper plate, inked with ceramic color, and transferred to tissue paper. While the
color is still wet, the tissue paper is pressed against a porcelain object, leaving the
design on its surface.
History of porcelain
Oriental porcelain. The Chinese probably made the first true porcelain during the Tang
dynasty (618-907). The techniques for combining the proper ingredients and firing the
mixture at extremely high temperatures gradually developed out of the manufacture of
stoneware. During the Song dynasty (960-1279), Chinese emperors started royal factories to
produce porcelain for their palaces. Since the 1300's, most Chinese porcelain has been
made in the city of Jingdezhen.
For centuries, the Chinese made the world's finest porcelain. Collectors regard many
porcelain bowls and vases produced during the Ming dynasty (1368-1644) and Qing dynasty
(1644-1912) as artistic treasures. Porcelain makers perfected a famous blue and white
underglazed procelain during the Ming period. Painting over the glaze with enamel colors
also became a common decorating technique at this time. During the Qing period, the
Chinese developed a great variety of patterns and colors and exported porcelain objects to
Europe in increasing numbers.
By the 1100's, the secret of making porcelain had spread to Korea and to Japan in the
1500's. Workers in these countries also created beautiful porcelain objects. A Japanese
porcelain called Kakiemon was first produced during the 1600's. It features simple designs
on a white background. Another well-known Japanese porcelain called Imari ware, or Arita,
is famous for its dense decorations in deep blue and red.
European porcelain. As early as the 1100's, traders brought Chinese porcelain to Europe,
where it became greatly admired. However, it was so rare and expensive that only wealthy
people could afford it.
As trade with the Orient grew during the 1600's, porcelain became popular with the general
public. The custom of drinking tea, coffee, and chocolate became widespread and created a
huge demand for porcelain cups and saucers. European manufacturers responded by trying to
make hard-paste porcelain themselves, but for a long time they failed to discover the
secret. Nevertheless, some of their experiments resulted in beautiful soft-paste
porcelain. The first European soft-paste porcelain was produced in Florence, Italy, about
By the 1700's, porcelain manufactured in many parts of Europe was starting to compete with
Chinese porcelain. France, Germany, Italy, and England became the major centers for
European porcelain production.
French porcelain. France became famous during the 1700's as the leading producer of
soft-paste porcelain. The first factories were established at Rouen, St. Cloud, Lille, and
The most celebrated type of soft-paste porcelain was first produced at Vincennes in 1738.
In 1756, the factory was moved to the town of Sevres. Its soft-paste porcelain became
known as Sevres. The earliest Sevres had graceful shapes and soft colors. Sevres pieces
produced from 1750 to 1770 were decorated with brilliant colors and heavy gilding. Many of
these pieces had richly colored backgrounds and white panels painted with birds, flowers,
landscapes, or people. Sevres is also noted for its fine figurines of biscuit (unglazed
Beginning in 1771, a hard-paste porcelain industry developed near Limoges, where kaolin
deposits had been discovered. By the 1800's, Limoges had become one of the largest
porcelain centers in Europe. An American named David Haviland opened a porcelain factory
at Limoges in 1842 to make tableware for the American market. Haviland porcelain features
soft colors that blend together and small floral patterns.
German porcelain. A German chemist named Johann Friedrich Bottger discovered the secret of
making hard-paste porcelain in 1708 or 1709. This discovery led to the establishment of a
porcelain factory in Meissen in 1710. Meissen porcelain is sometimes called Dresden
because Bottger first worked near the city. For nearly a century, it surpassed in quality
all other hard-paste porcelain made in Europe.
The great success of Meissen porcelain can be partly attributed to the fine artists who
decorated it. They painted the wares with an amazing variety of colors and designs. Johann
Horoldt (or Herold), who became chief painter in 1720, produced beautiful Chinese and
Japanese as well as European designs. Johann Kandler, who worked from about 1730 to 1770,
is famous for his exquisite figures of animals and people.
Political disorder in Germany and competition from Sevres porcelain drove the Meissen
factory into decline during the late 1700's. It continued to operate but did not make
wares of the same artistic quality.
English porcelain. England is well known as the center for the production of bone china.
Before the invention of bone china, the English manufactured fine soft-paste porcelain at
Chelsea, Bow, and Derby. Most of this English porcelain was styled after Oriental and
Worcester porcelain, first produced in 1751, is one of the oldest and best English
porcelains. During its early years, the Worcester factory produced soft-paste porcelain,
much of it decorated with Chinese designs in blue underglaze. Since the 1760's, it has
manufactured bone china in a wide variety of colors and patterns.
Josiah Spode developed a bone china paste that became the standard English paste in 1800.
Spode china featured a large number of designs but was especially noted for its exotic
Most of the famous English Wedgwood ware is not porcelain at all, but earthenware or
stoneware. Nevertheless, its classical Greek figures and reliefs became enormously popular
and had a great influence on porcelain designs throughout Europe.
Modern porcelain. Technical advances enabled the porcelain industry to produce porcelain
in large quantities. Today, extensive porcelain making is carried out in the United
States, Europe, and Japan. Some notable examples of fine contemporary porcelain are
American Lenox, German Rosenthal, and Japanese Noritake.
Contributor: William C. Gates, Jr., M.A., Curator and Historian, Ohio Historical Society.
Ringling Asian Art Center.