MICRO GLASS BEADS 6088A 
 
| 
 CHEMICAL ANALYSIS (%)  |  
| 
 Chemical Composition  | 
 Sio2  | 
 Al2O3  | 
 CaO  | 
 MgO  | 
 TiO2  | 
 Na2O3,K2O  | 
 B2O3  |  
| 
 Soad Lime Glass Beads  | 
 70-73  | 
 0.8-1.0  | 
 7-12  | 
 1.0-4.5  | 
 -  | 
 13-15  | 
 -  |   
Appearance:    Clean, transparent, no obvious impurity 
Refractive index: ≥1.5 
Density 2.4 – 2.6 g/cm3  
SiO2 content ≥70 %  
Roundness: see tables below 
  
Specification of Class A 
 :  Partical size distribution, roundness and defects 
 
| 
 BS6088 CLASS A  |  
| 
 Sieve  | 
 % Retained  | 
 Spherical Beads%  | 
 Defective Beads %  |  
| 
 1180µm  | 
 0-3  | 
 >70  | 
 <30  |  
| 
 850µm  | 
 5-20  |  
| 
 425µm  | 
 65-95  |  
| 
 <425µm  | 
 0-10  |   
 |