GLASS MICROSPHERE/PEARLS GRAIN 300/400 (25 KG BAG)

Glass Microspheres Grain 300/400 are a high-quality abrasive manufactured from class A soda-lime glass. Their spherical shape and specific particle size distribution allow for uniform satin finishes on metal surfaces, being especially effective on precious metals such as gold and silver, as well as on stainless steel. This type of microsphere is ideal for dry blasting processes with suction or pressure blasters, offering gentle cleaning without altering the dimensions of the parts. Furthermore, its composition is free of crystalline silica, which reduces health risks and complies with occupational safety regulations. Technical characteristics: Particle size: 300/400 Hardness: 6-7 on the Mohs scale Bulk density: 1.5 g/cm3 Shape: Spherical Color: Translucent white Chemical composition: SiO2 70-73%, Na2O 13-15%, CaO 7-11%, MgO 3-5%, Al2O3 0.5-2% Applications: Aesthetic finishing in jewelry and watchmaking Cleaning and preparation of metal surfaces Shot peening treatments to increase fatigue resistance Removal of burrs and oxides without damaging the base surface Presentation: 25 kg bag, facilitating handling and storage in industrial environments.