Glass balls 4 mm

Glass beads, very pure lime-soda-glass Ø 4 ± 0,3 mm Glass balls made of very pure lime-soda-glass. Manufactured by a special method, which allows balls with very high roundness from 4 mm. Very smooth surface Very small proportion of air bubbles Application as stirrer balls and mixing balls for aerosol sprays, as valve ball for bottle valves. Thanks to its high degree of purity also as a grinding and dispersing ball suitable for grinding pigments, agrochemicals and biological and other preparations. Technical data: refractive index 1.5159. Chemical composition: SiO2 68,1 %, Na2O 15,0 %, CaO 8,3 %, MgO 2,5 %, Al2O3 3,3 %, other 2,80 %. Specific gravity approx. 2.5 g/cm3.