Building Materials
Distemper is

A paint consisting of colored cement and water
A drying agent
A water proofing agent
A paint consisting of powdered chalk, pigments and water

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Building Materials
When a brick is immersed in water for 24 hours and then dried, if

10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
All listed here
50 percent surface is covered with grey or white deposits, the brick has serious efflorescence
No grey or white deposits appear on the surface, the brick is free from soluble salts

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