|                                                                           | Class | Material used | Median *diameter
 ( µm )
 | Particledensity
 ( g/cm3 )
 | Chemical composition% ( mass )
 |                          | Class 1Class 2
 Class 3
 | Quartz sand  | 185 to 20027 to 31
 6.6 to 8.6
 | 2.6 to 2.7 |                                                                                                 | SiO2 |   | 95min |                                      | Fe2O3, Al2O3,TiO2MgO,Ign.loss
 | 5max |  |                          | Class 4Class 9
 | Talc | 7.2 to 9.24.0 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 5Class 10
 | Fly ash | 13 to 174.8 to 5.7
 | 1.95 min | SiO2Åc45minIgn.lossÅc5max
 |                          | Class 7Class 8
 Class 11
 | **KANTO
 (Japanese) loam
 | 27 to 316.6 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 µmAbsorbed amount of DBP ••• 25 to 34 ml/100g
 Adsorbed amount of iodine ••• 22 to 30 mg/g
 |                          | Class 16Class 17
 | Calcium- carbonate (heavy)
 | 3.6 to 4.61.9 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 ofClass 1, Class 2 and Class 3
 ( Quartz sand )
 |                                                                                                    | Particlesize 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 )
 |                                                                                                    | Particlesize 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 ofClass 5 and Class 10
 ( Fly ash )
 |                                                                                                    | Particlesize 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 ofClass 7, Class 8 and Class 11
 ( KNATO(Japanese) loam )
 |                                                                                                    | Particlesize 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 ))
 |                                                                                                    | Particlesize 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.  | - |  |  |