Class | Material used | Median * diameter ( µm ) | Particle density ( g/cm3 ) | Chemical composition % ( mass ) | Class 1 Class 2 Class 3 | Quartz sand | 185 to 200 27 to 31 6.6 to 8.6 | 2.6 to 2.7 | SiO2 | | 95min | Fe2O3, Al2O3,TiO2 MgO,Ign.loss | 5max | | Class 4 Class 9 | Talc | 7.2 to 9.2 4.0 to 5.0 | 2.7 to 2.9 | SiO2 ••• 60 to 63, | Al2O3 ••• 0 to 3, | MgO ••• 30 to 34 | Fe2O3 ••• 0 to 3, | CaO ••• 0 to 2, | Ign.loss ••• 3 to 7 | | Class 5 Class 10 | Fly ash | 13 to 17 4.8 to 5.7 | 1.95 min | SiO2Åc45min Ign.lossÅc5max | Class 7 Class 8 Class 11 | ** KANTO (Japanese) loam | 27 to 31 6.6 to 8.6 1.6 to 2.3 | 2.9 to 3.1 | SiO2 ••• 34 to 40, | Al2O3 ••• 26 to 32, | MgO ••• 0 to 7 | Fe2O3 ••• 17 to 23, | CaO ••• 0 to 3, | Ign.loss ••• 0 to 4 | | Class 12 | Carbon black | Particle size range ••• 0.03 to 0.20 µm Absorbed amount of DBP ••• 25 to 34 ml/100g Adsorbed amount of iodine ••• 22 to 30 mg/g | Class 16 Class 17 | Calcium- carbonate (heavy) | 3.6 to 4.6 1.9 to 2.4 | 2.7 to 2.8 | CaO ••• 54 to 56, | SiO2 ••• 0 to 3, | Ign.loss ••• 42 to 45 | MgO ••• 0 to 3, | Fe2O3 ••• 0 to 1 | | | * | Particle size distributions are defined by JIS 8901. | ** | Sintered at 800°C, 2hours. | Note :1) | Class15 Mixed powder is distributed by Japan Air Cleaning Association and contains 72% of Class8, 23% of Class12 and 5% of cotton linter. | 2) | Class13 and Class 14 are now absent ones. | | *Particle size distribution of Test Powders 1 | Particle size distribution of Class 1, Class 2 and Class 3 ( Quartz sand ) | Particle size µm | Oversize(on mass basis)% | Class 1 | Class 2 | Class 3 | 5 | - | 88±5 | 61±3 | 10 | - | 76±3 | 43±3 | 20 | - | 62±3 | 27±3 | 30 | - | 50±3 | 15±3 | 40 | - | 39±3 | 9±3 | 45 | 99 min. | - | - | 75 | 90±3 | 20max. | 3max. | 106 | 80±3 | - | - | 150 | 65±3 | - | - | 212 | 45±3 | - | - | 300 | 1max. | - | - | | Particle size distribution of Class 4 and Class 9 ( Talc ) | Particle size µm | Oversize(on mass basis)% | Class 4 | Class 9 | 2 | - | 79±5 | 4 | - | 55±5 | 5 | 69±5 | - | 8 | - | 23±5 | 10 | 40±5 | - | 16 | - | 6±3 | 20 | 12±5 | - | 30 | - | - | 40 | 3±3 | - | 75 | 1max | - | | Particle size distribution of Class 5 and Class 10 ( Fly ash ) | Particle size µm | Oversize(on mass basis)% | Class 5 | Class 10 | 2 | - | 82±5 | 4 | - | 60±3 | 5 | 84±5 | - | 8 | - | 22±5 | 10 | 60±5 | - | 16 | - | 3±3 | 20 | 32±5 | - | 30 | 15±3 | - | 40 | 8±3 | - | 106 | 1max. | - | | Particle size distribution of Class 7, Class 8 and Class 11 ( KNATO(Japanese) loam ) | Particle size µm | Oversize(on mass basis)% | Class 7 | Class 8 | Class 11 | 1 | - | - | 65±3 | 2 | - | - | 50±5 | 4 | - | - | 22±3 | 5 | 88±5 | 61±5 | - | 6 | - | - | 8±3 | 5 | - | - | 3±3 | 10 | 76±3 | 43±3 | - | 20 | 62±3 | 27±3 | - | 30 | 50±3 | 15±3 | - | 40 | 39±3 | 9±3 | - | 75 | 20max. | 3max. | - | | Class 12 Particle size range ( Carbon black ) | | Particle size distribution of Class 16 and Class 17 ( Calcium carbonate( heavy )) | Particle size µm | Oversize(on mass basis)% | Class 16 | Class 17 | 1 | - | 80±5 | 2 | 76±5 | 54±5 | 4 | - | 18±5 | 5 | 40±5 | - | 8 | - | 4±3 | 10 | 10±5 | - | 16 | - | 1max. | 20 | 1max. | - | | |