Water Vapour Permeability Tester
It is evaluated by clamping a circular test specimen over the mouth of a bottle containing a solid desiccant and subjecting it to a rapid current of air. The air inside the bottle is circulated by keeping the desiccant in motion. The increase in weight of the bottle in a specified interval of time gives the quantitative measure of the water vapour permeability of the leather sample under test.
|Speed of rotation of wheel||75 rpm|
|Distance between axis of rotation and axes of bottles||67 mm|
|Inner diameter of bottles||30 mm|
|Speed of rotation of fan||1425 rpm|
|Maximum number of bottles that can be mounted at a time||Six|