This technique is based on the mechanical action of abrasion.
friction of grains of a material harder than the object to be
polished enables precise removal of material. It is necessary to use
a fluid, which acts both as a lubricant and as a cooling agent.
This technique is used to polish almost all materials in bulk form, compact and as thin films. Fine particles and porous materials suit this preparation provided that they have been embedded. It can also be applied to multiphased materials and those containing precipitates or segregations. Material hardness is not critical with the exception of very soft materials.