Observation Methods
Hold Scimage's UV (purple) light at an oblique angle to illuminate the paper, and place a yellow filter over the phone lens to effectively block the UV when photographing.
New Taiwan Dollar (TWD)
The most accessible example is the New Taiwan Dollar. Whether it's the 100 or 1000 denomination, you can observe fluorescent fibers in green and blue. The 100 TWD note has more fluorescent fibers than the 1000 TWD note.
Korean Won (KRW)
The Korean Won was a pleasant surprise. After discovering that some banknotes contain fluorescent fibers, I took out my collected banknotes for a closer look. Among the notes I have, Korean banknotes feature not only blue and green fluorescent fibers, but also red fluorescent fibers!
Renminbi (CNY)
In the center of the Renminbi note, you can clearly see the fluorescence of “Square 1,” along with a small number of fluorescent fibers.
Vietnamese Dong (VND)
In addition to fluorescent fibers, Vietnamese dong also contains visible embedded fine threads in red and blue.
Japanese Yen (JPY)
After repeated observations of Japanese yen, I could not find even the slightest trace of fluorescent fibers.
Egyptian Pound (EGP)
In addition to fluorescent fibers, there is a prominent fluorescent security strip on the back of the banknote.
