

Potters used cobalt oxide pigment to create the darker hue of flow blue. The porous earthenware absorbed it and blurred when the pottery glaze fired. Although it blurred by itself, potters discovered that it could be made to really flow by the addition of a cup of lime or chloride of ammonia during glaze firing. This had the additional advantage of covering over printing faults, bubbles, and other defects in the pottery. As a result, some flow blue is so blurred that all details are invisible.


The mid-Victorian period brought greater creativity to Flow Blue wares, as potters mixed styles and ornamentation became elaborate and varied. Also during the mid-Victorian period, styles began to mix and merge with one another. So, there were things like Oriental-style plates with floral, Gothic, or scenic borders. Other elaborate motifs, like scrolls, pillars, columns, urns and wreaths became quite common. The pieces themselves included toilet wares and teapots, plates and platters, vases and garden seats, and even dog bowls.
Flow blue designs of the late Victorian period exhibited a marked Art Nouveau influence, with stylized florals and beautiful symmetry.
By the end of the Victorian Era, there were thousands of Flow Blue patterns. Though most Flow Blue wares came from English potteries, those in Germany, France, Belgium, the Netherlands, and the United States all made it as well. The most noted English potteries included such names as Wedgwood, Grindley, Davenport and the Johnson Brothers, while in the United States, Wheeling, Mercer, and Warwick.

By World War I, U.S. potteries were producing most of the flow blue for the domestic market, causing English potters to close up shop since these wares had never been popular in England. The desirability of the ware waned in both countries between the wars, but interest picked up again in the U.S. in the 1960s.

Collectors are always on the hunt for the early patterns from the 1840s. Unusual items such as rare shapes, egg baskets and egg cups, large sized platters and early tea and coffeepots command high prices. Egg baskets with eggcups will fetch over $1,000. A single eggcup in a rare pattern can fetch over $400, whereas a not so rare one would fetch maybe $65. Rare coffeepots could he worth over $2,000, and large turkey platters from the 1890s, $600 to $800 if the pattern is right.
To read more articles on antiques, please visit the Antiques Articles section of my Web site. And to stay up to the minute on antiques and collectibles, please join the over 30,000 readers by following my free online magazine, #TheAntiquesAlmanac. Learn more about world's fairs in the 2020 Summer Edition, online now. And to read daily posts about unique objects from the past and their histories, like the #Antiques and More Collection on Facebook.