No, because the water droplets inside the fog reflect white light (which is a all colours).
The dwell time of the fog depends on the ambient temperature and humidity.
Strong fog threads can be generated up to temperatures of about 40°C. However, (less intense) fog generation is even possible at higher temperatures.
The fog fluid is a mixture of highly pure alcohol as used in pharmaceutical manufacturing and demineralised water.
Nitrogen is used as a propellant. Therefore, the contact of the fog fluid with the skin is uncritical.
However, the fog fluid shall not be drunk.
Since the heating elements and the controls are precisely designed for fog generation at the vaporisation point of the original fluid, either the capillaries might clog or even no fog can be generated.
Like natural fog, the artificial fog condenses on cold surfaces as a moisture film.
The alcohol component of the fog fluid may remain for a while but also evaporates subsequently free of residues. The used fog fluid is highly pure.