Can 395nm UV light be used to check banknotes?

Depending on the banknote's anti-counterfeiting design, a 395 nm UV lamp can detect banknotes to a certain extent, although the results may not be as excellent as those of a typical 365 nm UV lamp. A thorough study is provided below:

1. The banknote detecting principle
Since 365 nm ultraviolet light may more efficiently trigger fluorescent reactions, the majority of banknotes' anti-counterfeiting fluorescent markings (such as security lines, fibers, and patterns) are made for these wavelengths.


Among the near-ultraviolet rays (UVA) is 395 nm. It is less effective and certain markings may not be colored or dull, even if it may also activate some luminous chemicals.

2. The 395 nm UV lamp's real impact
Some banknotes' fluorescent markings, such the US dollar, euro, and RMB security lines, may still be seen at 395 nm, albeit they are not as brilliant.

Potential failure: 395 nm may not be recognized by some high-security anti-counterfeiting features (such fluorescent fibers of certain hues), which need 365 nm to operate.

3. Safety Measures
Light source intensity: Although high-power 395 nm lights may compensate for the wavelength difference, caution should be used to prevent prolonged skin exposure or direct sight.

Ambient light: A gloomy environment is ideal for it.

Identification of counterfeit banknotes: Watermarks, convex and concave sensation, and other anti-counterfeiting characteristics must be used in conjunction with UV light to guarantee authenticity.

4. Suggestion
365 nm UV light is preferred: This wavelength is more dependable and is often used by professional banknote examination equipment.

Temporary replacement: You may test the fluorescence response of the actual banknote if there is just a 395 nm light, but you must use caution.

In summary, a 395 nm UV light is not the ideal option, although it can do certain banknote examination tasks. Investing in a specialized 365nm banknote examination pen or other equipment is advised if you must examine banknotes on a regular basis.