Meissen porcelain further precaution, very few workers knew the special secret ("arcanum") of how to make porcelain, and then perhaps only part of the process. Thus, for a few years, Meissen retained its monopoly on the production of hard-paste porcelain in Europe. By 1717, however, a competing production was set up at Vienna, as Samuel Stöltzel sold the secret recipe, which involved the use of kaolin, also known as china clay. By 1760 about thirty porcelain manufacturers were operating in Europe, most of them, however, producing frit based soft-paste porcelain. In order to identify the original Meissen products, Meissen developed markings that
Conseil de Famille to appoint a guardian to the minor; to authorize marriage or oppose it; to audit the accounts and decide questions concerning the minors estate. The French family council is founded on the Roman law of tutelage. Conseil de Famille Conseil de Famille () is a French institution for the protection of the interests of minors. By the Code Civil (art. 407–410) it is composed of seven members. The local justice of the peace (juge de paix) is the presiding officer. The other six members must be relations of the minor, chosen from the mothers and fathers side of the family