Machines for use with porcelain jars, capacities range from a min. of 1.5 l to a max. of 15 l. Suitable for carrying out grinding tests or simple wet process mixing tests on ceramic glazes and colouring agents, paints and other products. They can also be used for dry process grinding of solid substances such as clays, various minerals, etc.. They can be used for small production runs as well as lab tests.