(June 14th, 2004)
Test article: Health Pads (Gold Edition)
Test device: KST-900

Negative ions are odorless, tasteless, and invisible molecules that we inhale in abundance in certain environments; think of mountains, waterfalls, and beaches. Once they reach to our bloodstream, negative ions are believed to produce biochemical reactions that decrease levels of serotonin helping to relieve stress (calming), alleviate depression, boost our daytime energy and increase defence against infection.

Ions are molecules that have gained or lost an electrical charge. They are created in nature as air molecules break apart due to the sunlight, radiation, and moving air and water. You may have experienced the power of negative ions when you last set foot on the beach or walked beneath a waterfall. The air circulating in the mountains and the beach is said to contain tens of thousands of negative ions -- Much more than the average home or office building, which may contain dozens or hundreds, and in fact many register a flat zero.

Previous negative ion measurements had been done in various places in Japan.
In a regular room with windows: approximately 150 ion/cm3.
Near a river: approximately 600 ion/cm3.
Near a big fountain: approximately 1000 ion/cm3.
Near a waterfall (half the size of Niagara): approximately 3000 ion/cm3.
Near a big Tourmaline stone: approximately 500 - 2000 ion/cm3.

Measurement was performed for 60 seconds in a closed room with a temperature of 25 degree Celcius, and humidity of 35%.

Results: