Heated salt crystals produce negative ions.
The result of this discovery quickly led to the making of
a lamp with a crystal salt top and a bulb in it. This being
the best means to attract people to opt this mechanism to
ionize their air. Salt Rock Tealight was a later variant
based on the needs of the customers.
The effective negative ions produced by a
salt rock lamp depends on many factors. Most importantly
the size, surface area and the amount of heat produced.
As a rule of thumb, bigger lamps produce more negative ions.
The following table is generally used to find the appropriate
size for a room.
| Room Size |
Lamp Size |
| 10 sq m |
2 - 3 Kg |
| 15 sq m |
4 - 6 Kg |
| 20 sq m |
7 - 10 Kg |
As a general rule, add 3 - 4 Kg of salt rock
for an increase of 10 sq m in your room size.
Based on natural rock every salt item is unique
and different.
