Constitution
MCF rubber 1
KF96: 3 g; S-500: 3 g; 671A: 3 g; PVA: 3 g; MF: 0.75 g; TiO2: 0.5 g
MCF rubber 2
KF96: 3 g; S-500: 3 g; 671A: 3 g; PVA: 3 g; MF: 0.75 g; TiO2: 0.5 g; Na2WO4∙2H2O: 0.5 g; water: 3 g