Bubble Point tests exploit surface tension and capillary action. Liquid is introduced and held within the
membrane pore by these forces. The Bubble Point pressure is the minimum pressure required to overcome
these forces and to expel liquid from the largest pores within the membrane.
4 × K × g × Cos q
BP = -------------------------
D where K = Shape correction factor g = Liquid surface tension,
q = Contact angle, D = Pore diameter
Bubble Point tests exploit surface tension and capillary action. Liquid is introduced and held within the
membrane pore by these forces. The Bubble Point pressure is the minimum pressure required to overcome
these forces and to expel liquid from the largest pores within the membrane.
4 × K × g × Cos q
BP = -------------------------
D
where K = Shape correction factor g = Liquid surface tension,
q = Contact angle, D = Pore diameter