Densometer For Perosity And Air -Resistance
In Manufacturing and printing, to control the selection of materials affording the appropriate degree of liquid (ink,varnish,sizing)absorption.
To test filters,porous bags & materials where controlled porosity is essential.
To test insulting materials for air resistance.
To supplement other physical tests enabling regulation of the manufacturing process to give the desired formation, appearance or strength since there is a close correlation in given material between air permeability and other properties.