Soft-paste porcelain its soft-paste and hard-paste varieties is fraught with misconceptions", and various categories based on the analysis of the ingredients have been proposed instead. Some writers have proposed a "catch-all" category of "hybrid" porcelain, to include bone china and various "variant" bodies made at various times. At least in the past, some sources dealing with modern industrial chemistry and pottery production have made a completely different distinction between "hard porcelain" and "soft porcelain", by which all forms of pottery porcelain, including East Asian wares, are "soft porcelain". Chinese porcelain, which arrived in Europe before the 14th century, was much admired and
Biscuit porcelain by giving them a temporary coating of wax or something similar to keep the glaze off; this is a fairly common feature of Longquan celadon (which is porcelain in Chinese terms), and also found in Ming dragons. Some Chinese pieces are described as "porcelain with polychrome enamels on the biscuit" - that is, using the normal "overglaze" technique on biscuit, but with no actual glaze, often a revivalist style evoking earlier sancai wares (which were not in porcelain). The laborious and mostly 19th-century pâte-sur-pâte technique often uses biscuit for at least one of the colours. Biscuit porcelain Biscuit porcelain, bisque