Anthracite filter is made from high quality white coal. Anthracites are black and have a brilliant, almost metallic lustre. Hard and brittle, they can be polished and used for decorative purposes. They are difficult to ignite but burn with a pale-blue flame and require little attention to sustain combustion. In the past they were used for domestic heating, but today they have given way to other sources of energy.
1) Good glossiness
2) High mechanical strength
3) Stable chemical property
4) It is insoluble in alkaline water, acid water and Neutral water.