The expansion of Perlite takes place due to the
presence of 2 to 6 per cent combined water in Perlite Ore. Combined water vaporizes and creates
countless tiny bubbles that create a light weight product and other exceptional
physical properties of Expanded Perlite.
The expansion process also creates one of Perlite’s
most distinguishing characteristics - its white colour irrespective of the
colour of crude Perlite Ore which could be from light gray to glossy black.
Expanded Perlite can be manufactured to weigh as
light as 32 kgs./cu.m., making it suitable for many exciting
applications.
Chemically, it is an amorphous mineral consisting
of fused sodium potassium aluminium silicate.