Outgoing correspondence from senior staff of the Laverton pigments plant under Imperial Chemical Industries of Australia and New Zealand Limited and, from 1970, Pigment Manufacturers of Australia Limited (PMA Ltd). Included are letters, memoranda and telex transcriptions from general managers and department heads with a broad range of correspondents, including PMA Ltd's parent companies ICI and BASF. Covering a broad range of topics, the correspondence was held in suspension files sorted by date, with no apparent breaks, from 1966 until 1991, the year of the plant's closure.

Each suspension file has been divided into several parts as part of preservation work carried out during the archiving process. In most cases item titles have been taken from the tabs on these files, which have been retained in Part 1 of each group where available.

The provenance of Pigment Manufacturers of Australia Limited has been assigned to this series as it was not possible to determine a finer provenance attribution. Also included are files pre-dating the formation of PMA Ltd, which have been assigned the provenance of Pigments Plant at Laverton.