The concept behind solarised water, rooted in colour therapy (chromotherapy), suggests that penetration of light through blue-coloured bottle changes the chemical, physical and biological properties of the water. This is called solarised or sun-charged water. The longer the water remains exposed to the sun (for 1 to 6 hours), the stronger is its effect.
The science behind sun-charged water is that when a bottle is left under the sun long enough, the heat and ultraviolet rays of the sunlight destroy bacteria and other harmful pathogens.
