Classic Neuburg Siliceous Earth is a natural combination of corpuscular Neuburg silica and lamellar kaolinite: a loose mixture impossible to separate by physical methods.
Neuburg Siliceous Earth is available in four different particle fractions, marked with the letter V, N, Z and P.
The measuring method for this particle size distribution is based on the Fraunhofer analysis of diffraction spectra. The analyses were performed with a Matersizer 3000, a laser device from Malvern Instruments.
In addition, classic Neuburg Siliceous Earth is available in different shades and colors ranging from yellow to off-white to white depending on the particle size distribution. The color neutrality is described by numbers.