Micro Shirasu-balloons / Name of sample: B-3-1

Fig. SEM photograph.

Fig. Particle size distribution.

---

Colors and whiteness.

L	a	b	Whiteness (Lab)	Whiteness (Hunter)
77.79	2.52	10.84	75.15	48.46

Mean diameter, Amount of particles floating after dispersed in water and Density.

Mean diameter (µm)	Particles floating (wt%)	Particles floating after dispersed with ultra-sonic (wt%)	Particle density (g/cm3)	Bulk density (g/cm3)	Tapped bulk density (g/cm3)
50.0	58.9	24.2	0.81	0.16	0.21

Strength (amount of nonfractured particles after compressing).

Particle density before testing (g/cm3)	Particle density after uniaxial compressing at 5MPa (g/cm3)	Nonfractured particles after uniaxial compressing at 5MPa (wt%)	Particle density after hydrostatics compressing at 8MPa (g/cm3)	Nonfractured particles after hydrostatics compressing at 8MPa (wt%)
0.81	1.37	37.6	1.38	37.0