Powder metallurgy is a method of producing parts from metals which normally would not alloy easily, or from mixtures of metals and non-metals, taking advantage of their combined properties. Although the powder metallurgical process is costly, it has the advantage of economically producing large amounts of small and intricately shaped parts with homogenous structures. The density of compacted and sintered parts affects their strength, ductility and hardness. Therefore metallographic control of porosity is an integral part of quality control. During metallographic grinding, metal is pushed into the pores and if the subsequent polishing steps are not carried out properly, residual metal “lids” covering the pores will obstruct the evaluation of the correct porosity. Thorough grinding and polishing with diamond, and microscopic checks between polishing steps, assure a true representation of the structure. The given procedures for automatic preparation and the chemical etchants have been used successfully in day to day practical laboratory application and give reproducible results.