Porosity of different AM processed samples by different materials.

Process	Material	Porosity	Applications	References
VP	Bioactive glass and poly (ε-caprolactone)	63–77 vol%	Microfiltration and particle filtration	23
	Silica	33.3 vol%	Microfiltration	24
	Al2O3–ZrO2	36 vol%	Microfiltration	25
MJ	Polycaprolactone	92%	Microfiltration	26
	PZT	1 vol%	Particle filtration	27
BJ	Si3N4	60–70 vol%	Particle filtration
	Tricalcium phosphate	42–63 vol%	Microfiltration	28
	Polyethylene	23–40 vol%	Microfiltration	29
ME	Alumina and other ceramics	1.5 vol%	Particle filtration	30
	Stratasys ABS (P400)	∼50.7 vol%	Microfiltration	31
	Polycaprolactone	48–77%	Microfiltration	32
PBF	Al2O3	34 vol%	Microfiltration	33
	Polycaprolactone	37–55%	Particle filtration	32
SL	Al2O3	2.9 vol%	Particle filtration	34
	Si–SiC	69.4 vol%	Microfiltration	35
DED	Ti, NiTi	12–42 vol%	Particle filtration and microfiltration	36