Pressing agents and lubricants
The pressing agents and lubricants are used, amongst others, for isostatic pressing of ceramic bodies, where they promote better shaping characteristics. They facilitate the flow of the pressing granules under pressure, thus leading to a more homogeneous compaction owing to their simple destruction without leaving residual granulate structures. The reduction of the internal stresses avoids cracks and crawling at the edges during the technological steps that follow. When using metal moulds, the friction between pressed piece and mould wall is reduced, which in turn allows a prolonged working life of the moulds.