Hiding power definition

The definition of hiding power is based on a black and white contrasting support upon which the film of coating is applied. The thickness h of the applied film is determined at the point at which the contrasting surface just disappears, as judged... 

Methods aimed at the determination of tannin material content in the extract. The classical method of this type still used is the hide-power and derived methods. These methods were devised to determine which percentage of the extract would participate in leather tanning. The main drawback for their use for adhesives in their inability to detect and determine the approximate 3 to 6% of monoflavo-noids and biflavonoids, or phenolic nontannins, present in the extract which do not contribute to tanning capacity but which do definitely react with formaldehyde and contribute to adhesive preparation. 

Definition Clay (an aluminum silicate) mineral main constituent of kaolin Formuia AI2O3 2Si02 2H2O Uses Extender pigment offering hiding power and suspension, flow control used in interior emulsions and primer paints and polyester premix plastics coagulant aid for water treatment... 

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