Our Aktifit products are based on the premium Silfit Z 91, whose surface is specifically modified with functional groups. During the manufacturing process, any by-products generated are largely removed. Thanks to the coupling reaction, which directly fixes the functional groups to the filler surface, undesirable side effects – such as those occurring with the direct addition of additives – are almost completely avoided.
All calzined products have a particle size that approaches that of the uncalcined basic material Sillitin Z 86.
The measuring method for this particle size distribution is based on the Fraunhofer analysis of diffraction spectra.
The analyses were performed with a Mastersizer 3000, which is a laser device from Malvern Instruments.
With regard to the CIELAB color values L*, a* and in particular b*, the calcined products are significantly brighter and more color neutral than the classic products Sillitin and Aktisil.
