Crystals of calcium carbonate formed by fat lime are not very strong.

The ______________ is a hard substance and is available from the Earth at the place where pine trees exist in past.

The ____________ are coatings of fluid materials and they are applied over the surfaces of timber and metals.

___________________ forms the bulk of aluminium Paints.

The main objective of applying _________ to the plastered surfaces is to create a smooth surface.

_____________________ contains calcium sulphide with varnish.

_________________ is most common material used as a vehicle of a paint.

The ______ varnishes dry slowly, but they form hard and durable surface.