Old antique gray clouds enamel colander

Antique enamel colander, gray clouds. 

Nice old enamel colander gray clouds. On three small ball feet. Dated: 1930 - 1950. 

• Height: 11 cm. 
• Diameter: 30.5 cm. 
• Length: 39 cm (including handle). 

Gray clouds is typical enamel cooking gear from the Dutch DRU factory, popular in the 1950s. 

Enamel. 
Vitreous enamel, also called porcelain enamel, is a material made by fusing powdered glass to a substrate by firing, usually between 750 and 850 °C (1,380 and 1,560 °F). The powder melts, flows, and then hardens to a smooth, durable vitreous coating on metal, or on glass or ceramics. 

The term "enamel" is most often restricted to work on metal. Enamelling is an old and widely adopted technology. 

Since the 19th century the term applies also to industrial materials and many metal consumer objects, such as some cooking vessels, sinks, and tubs. ("Enamelled" and "enamelling" are the preferred spellings in British English, while "enameled" and "enameling" are preferred in American English.)