Overview: This document provides technical specifications for SiLibeads® glass beads produced by SIGMUND LINDNER GmbH. It includes details on chemical composition, physical properties, and available sizes.

Chemical Composition: The glass beads are primarily composed of SiO2 (81.20%), B2O3 (12.40%), and Na2O (2.93%), with trace amounts of Sb2O3 and As2O3. The beads conform to hydrolytic class HGB 1 (DIN ISO 719), acidic class S 2 (DIN 12116), and alkaline class A 1 (DIN 695).

Physical Properties: The specific weight of the beads is 2.23 kg/ltr as per DIN ISO 787-10. The document lists standard sizes ranging from 1.588 mm to 31.750 mm in diameter, with specific tolerances and roundness specifications. The surface finish is either polished or matt, depending on the size.

Standard Sizes and Weights: The document provides a table of standard sizes with corresponding tolerances, roundness, surface finish, weight per 1000 pieces, and the number of pieces per 1000 grams. For example, a 1.588 mm bead weighs 4.67 grams per 1000 pieces, with 213,867 pieces per 1000 grams.

Grades and Tolerances: The beads are graded according to ANSI/AFBMA - 10.1989 standards, with deviations from spherical form and maximum surface roughness specified for different grades. Grade 200 allows a deviation of 5 microns and a surface roughness of 0.2 microns, while Grade 100 allows 2.5 microns deviation and 0.125 microns roughness.