In LP IMPEX  facility the kaolin deposited are open-mined. The mined kaolin is termed as the matrix. The matrix can be classified on the basis of chemical and physical properties. The primary sorting of the matrix is done on the basis of colour (for example: white, sandy white, pink grey or yellow). The colour to the matrix is imparted by the various impurities (both inorganic and/or organic) present in the matrix.

Typically, presence of iron imparts a pink colour to the matrix. The mined and sorted kaolin is then subject to processing by a wet route to produce processed kaolins with desired properties for various applications. Matrix can be alternatively processed by a dry route; however the latter is only for certain applications. At LP IMPEX, all kaolins are processed via the wet route.