... glasses for material Round ratio above 85% ISO, CE Grinding Glass Beads III. HardnessHV, Loading 100g, residence time: 12sthe average of ... ) time of shot peening:5min(5)the diameter of the glass beads: 250 microns(6)Gross Weight of the tested ... , ink, coatings, resins, chemical engineering, with the advantages of smooth surface, even size, high hardness, good chemical stability. Thanks to the ...