Table 1. Recipe of the Thermally Expandable Microspheres (phm)

Materials	A (r 0.5)	A (r 1.0)	A (r 1.5)	A (r 2.0)
AN	80	80	80	80
MAN	20	20	20	20
Iso-Pentane	15	15	15	15
Cross-linking Agent	0.5	1.0	1.5	2.0
Initiator	1.0	1.0	1.0	1.0
Colloidal Silica	20	20	20	20
Water	300	300	300	300