The following is an excerpt from “Origine des Potiers de Grès d’Alsace,” Bulletin du Cercle Généalogique d’Alsace No. 60, written by Marcel Schmitter.
Alsatian stoneware pottery is characterized by its color (gray and blue), by its hardness and by the use of salt varnish.
It is distinguished from other stoneware pottery in
The following are additional notes that V. Schmitter emailed me in Feb. 2008:
In the article "Alsatian pottery" there was a translation error. The french word "grès" has two different meanings :
In the geological domain "grès" is a type of sedimentary rock composed predominently of sandlike quartz grains cemented by lime, silica and other materials. The english name of this rock is sandstone.
In the ceramical domain "grès" is a heavy, dense, nonporous type of pottery obtained by baking the clay objects at a higher temperature (1250°C) than conventionnal pottery (900°C). In this case the english word is stoneware. In the past, before the expansion of the canning industry, stoneware pottery was mostly used as containers for foodstuff.