Address:129, Gangcheng Street, Qinhuangdao, Hebei, China Zip:
1, Boron (B) silicate glass beads: In pure-white color, good toughness, can stand wear & tear, good stabilization on chemical properties, PH=7.2 Micro hardness≥635kg/mm2; 2, Calcium (Ca) silicate glass beads: In blue-white color, good transparency Micro hardness≥625/mm2 3, Sodium (Na) silicate glass beads: In pure-white color, same as boron silicate in appearance, Micro hardness: 582kg/mm2,