How To Check Counterfeit Money With Pen, A common method to detect counterfeit currency is by using a special counterfeit detection pen. These pens are widely used because they are simple, fast, and inexpensive. Here’s how they work and how to use them:
- What the Pen Does
- The pen contains a chemical, usually iodine-based, that reacts with the starch in regular paper.
- Genuine banknotes are typically printed on cotton fiber paper, which does not contain starch.
- How to Use the Pen
- Take the pen and mark a small line on the banknote.
- Wait a few seconds to observe the color change.
- Interpreting the Results
- If the mark turns dark brown or black, the note is likely fake, because regular paper with starch reacts with the pen.
- If the mark remains light or yellowish, the note is likely genuine, as cotton-based currency paper does not react strongly.
- Limitations
- This method is not foolproof. Sophisticated counterfeiters may use starch-free paper, so the pen may not detect all fake notes.
- It is best used in combination with other verification methods, such as checking the watermark, security thread, holograms, and microprinting.
For research purposes, you can mention that counterfeit detection pens are an accessible chemical-based tool, primarily relying on the reaction between iodine and starch, and that they are part of multi-layered verification techniques.