| 摘要 |
A handwashing medium which may be in liquid, cream, powder or spray form is provided with a detection agent such as an invisible fluorescent or phosphorescent additive, which combination is then rubbed onto one's hands using the individual's handwashing technique. The individual's hands are rinsed with water as in the normal handwashing fashion and the hands are then exposed to an activating agent such as an ultraviolet (UV) light source where the invisible detection agent is fluorescent. Areas missed during handwashing retain the fluorescent additive and are clearly visible due to fluorescence. In the case of a phosphorescent detection agent, an ultraviolet light source is not necessary as the phosphorescent detection agent will emit light on its own without any external light source in a reduced light environment. The method is useful in evaluating one's handwashing technique and in the teaching of proper hygiene. The invisible fluorescent or phosphorescent additive in a handwashing medium may also be used in determining patterns of body part contact such as contact with one's hands or feet in a given area by applying the invisible fluorescent or phosphorescent additive to a body part and either exposing the area to UV light or viewing the area of interest in reduced light to detect the presence of residue of the fluorescent or phosphorescent agent. The use of a phosphorescent additive in the handwashing medium may also be used in determining patterns of body part contact by viewing the area of interest in reduced light.
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