Canton enamel

Canton enamel is the conventional name for Chinese painted enamel on copper or copper alloy associated with the workshops of Guangzhou, formerly known in the West as Canton.

What is Canton enamel?

Canton enamel is made by applying coloured glass enamels to a shaped metal body and fusing them through repeated low-temperature firings. It should not be confused with porcelain: beneath the decoration is a thin body of copper or copper alloy rather than ceramic.

The technique developed in China during the Kangxi reign (1662–1722), around the late seventeenth and early eighteenth centuries. Guangzhou became an important centre because it was China’s principal maritime trading port and a meeting place for Chinese craftspeople, European merchants and foreign technologies.

Painted enamels were also produced in the imperial workshops in Beijing. Craftsmen, designs and materials circulated between Beijing and Guangzhou, so not every Chinese painted enamel object should automatically be described as Canton enamel.

How Canton enamel was made

The metal body was normally formed from thin sheets of copper, which could be hammered, raised, cast or joined to create dishes, boxes, vessels and more complicated forms.

Both sides of the metal were usually coated with enamel. The layer on the reverse or interior is known as the counter-enamel and is often white, pale blue or turquoise. On the decorated surface, the artist applied a ground colour, sketched the design and built up the image with several layers of coloured enamel. Fine outlines, gilding and small details could be added during later stages.

Each layer required careful firing. Temperatures had to be high enough to fuse the enamel but controlled carefully to prevent earlier colours from running or the thin metal body from becoming distorted.

The available palette included white, turquoise, blue, green, yellow, iron red, brown, black and several shades of pink. The introduction of opaque white and gold-derived pink enamels allowed painters to create softer shading and a wider range of tones comparable to the famille rose palette used on Qing porcelain.

Decoration

Canton enamel combines Chinese subject matter with designs influenced by international trade. Common Chinese motifs include:

• Birds, flowers and insects
• Dragons, phoenixes and mythical animals
• Landscapes and garden scenes
• Figures from literature and everyday life
• Buddhist and Daoist emblems
• Auspicious fruits, flowers and symbols of longevity

Objects intended for European and other overseas markets may feature European figures, harbour scenes, buildings, pastoral landscapes, Christian subjects, coats of arms and Rococo-style scrollwork. Some pieces combine European-shaped vessels with entirely Chinese decoration, while others place Western figures within borders of lotus petals, flowers and traditional scrolls.

This mixture of traditions is one of the defining characteristics of eighteenth-century Canton enamel.

Production and trade

Guangzhou workshops supplied several different markets. Some wares were made for Chinese domestic use, while others were sent to the Qing court as tribute or produced according to court-approved designs. Large numbers were also exported through the maritime trade.

Production reached a particularly refined level during the Qianlong reign (1736–1795). Eighteenth-century wares include delicately painted dishes, cups, ewers, kettles, teapots, vases, boxes, trays, incense burners and elaborate table ornaments.

Manufacture continued throughout the nineteenth century, when workshops produced both traditional Chinese designs and increasingly commercial export wares. During the late nineteenth and twentieth centuries, the range expanded to include small boxes, matchbox covers, ashtrays and other decorative or souvenir objects.

Basse-taille Canton enamel

A specialised form of late eighteenth-century Canton enamel uses the basse-taille technique. In this method, transparent coloured enamel is applied over a textured, engraved or patterned metal surface. The pattern remains visible beneath the enamel and reflects the light, producing a shimmering or scale-like appearance.

These wares are often decorated with gold foil, Buddhist emblems and deep translucent colours. They represent a technically demanding branch of Canton enamel rather than the usual painted white-ground type.

Canton enamel, cloisonné and porcelain

Although all three may use coloured enamels, their construction is different:

• Canton painted enamel: colours are brushed onto a continuous enamel ground covering a copper or copper-alloy body.
• Cloisonné: thin metal wires are fixed to the body to form individual cells, which are then filled with enamel.
• Enamelled porcelain: the coloured enamels are applied to a fired ceramic body rather than metal.

The absence of metal dividing wires is therefore an important feature distinguishing painted Canton enamel from cloisonné.

Identifying and assessing Canton enamel

Collectors should examine the construction, counter-enamel, palette, painting style, gilding, form and wear together. Many genuine pieces are unmarked, while some bear imperial reign marks, workshop marks or later apocryphal marks. A mark by itself does not establish the age or place of production.

Because the copper body is flexible but the fused enamel is brittle, impacts may produce dents accompanied by cracks, flaking or areas of enamel loss. Exposed copper may develop green corrosion, particularly around damaged edges. Old filling, repainting and restored enamel are also frequently encountered.

Fine eighteenth-century examples often display carefully graduated colours, confident drawing and complex gilded borders. Later wares can still be attractive and historically interesting, but quality varies considerably. Reliable attribution should depend on the complete object rather than a single colour, mark or decorative feature.