The next twenty-five years saw Mintons develop several new specialities in design and technique, while production of established styles continued unabated. As at Sèvres itself, and many other factories, wares evoking Sèvres porcelain of the 18th century had become popular from about the 1830s, and Arnoux perfected Mintons' blue and pink ground colours, essential for the Sèvres style, but much used for other wares. The Sèvres pink was called "rose Pompadour", leading Mintons to call theirs "rose du Barry" after another royal mistress. Alexandre Brongniart (1770-1847), artistic director of Sèvres had given Mintons plaster casts of some original moulds, which enabled them to make very close copies. At the end of the century, when the husband of Georgina Ward, Countess of Dudley, sold his original Sèvres pot-pourri vase in the shape of a ship, a famous, spectacular and rare Sèvres shape of the 1760s (now Getty Museum) in the 1880s, Mintons were commissioned to make a copy.