The German term for an independent painter or workshop specializing in the decoration of faience, porcelain or glass blanks.
From the time when enamel decoration was beginning to be added to white porcelain blanks in Canton for the export trade, undecorated, glazed and fully fired blanks were available in Canton for sale as they were. No doubt those also found their way to Europe to be decorated by enamels in various workshops, but these pieces are rarely found.
Hausmalerie was most common around the mid 18th century, from the 1730s and onwards for a few decades. These European workshops bought blanks from European porcelain factories too, and we even have the name on some of these workshops.
It is generally thought that this porcelain was second grade and discarded by the European porcelain factories while the Chinese blanks was probably of normal grade.
It is within parenthesis my thought that this enameling eventually developed into a regular trade in repairing of flawed and unsellable porcelain, by covering the defects with enamels, and that this in fact is the origin of the name 'clobbering'. as an old word originally referring to the mending or patching up clothes or old shoes.