Purpose
In pigment slurry of papers containing salt, the slurry or its aqueous extract is electrically conductive. Conductivity of such solution is there for a (qualitative) measure of their salt content.
Principle
Pure water is a non-conductor. Generally speaking, the conductivity of aqueous solution increases with their salt content. Conductivity measurement are performed with the aid of specialized measuring cell that are immersed in the liquid to be tested.
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