VitraPOR® filters are produced in a sophisticated manufac- turing process. Special milling procedures are used to obtain splintering grains with a large surface. With a certain post-production treatment the surface of the raw material is additionally enlarged. VitraPOR® sinterfilters have inner surfaces of up to 1.75 m²/gr. and a porevolume of up to 50%.

Highest possible chemical resistance, minimum thermal expansion as well as the high thermal shock resistance are the characteristical points of ROBU® glassfilter products. Due to these features, the sintered filters are specially designed for use in a variety of the chemical, biotechnical, pharmaceutical and laboratory fields.