Abstract
By recomposed low pressure porosimeter with mercury intrusion, cumulative volume of pore spaces in the sized cotton or acrylic fabrics was determined in pore radius range between 7μm and 180 μm. Filling ratio defined as pore volume difference between before and aftersizing was calculated for pore space range of inter yarn (γ1) and intra yarn (γ2). The filling tendencies were contributed with geometry of the fabrics and properties of the sizing solutions. Relation between filling ratio and air permeability or stiffness of those sized fabrics was discussed.