Can Science Beat Counterfeit Detector Pens?

From Reactions.

Counterfeiting money is wrong. Obviously. But if you wanted to take your totally not real money and fool a counterfeit detection pen, could you do it? We try a number of chemistry tricks to fool the iodine-starch reaction central to these pens, and of course learn a little chemistry along the way.

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Credits:
Executive Producer:
Matthew Radcliff

Producers:
Elaine Seward
Andrew Sobey
Darren Weaver

Writer:
Alex Dainis, Ph.D.

Host:
Alex Dainis, Ph.D.

Scientific Consultants:
Tatsuo Kaiho, Ph.D.
Radu Silaghi-Dumitrescu, Ph.D.
Leila Duman, Ph.D.
Brianne Raccor, Ph.D.

Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Reactions is a production of the American Chemical Society.
© 2023 American Chemical Society. All rights reserved.

Sources:
https://www.flinnsci.com/counterfeit-money-detector-pen/ap6567/
https://chem.libretexts.org/Bookshelves/Biological_Chemistry/Supplemental_Modules_(Biological_Chemistry)/Carbohydrates/Case_Studies/Starch_and_Iodine#:~:text=Starch%20Test%3A%20Add%20Iodine%2DKI,will%20stay%20orange%20or%20yellow.
https://www.uscurrency.gov/about-us/currency-facts
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9784209/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9784209/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7077417/
https://www.ebi.ac.uk/pdbe/news/wonders-salivary-amylase
https://uwaterloo.ca/chem13-news-magazine/september-2015/activities/sharing-chemistry-community-c-difference#:~:text=starch%20to%20each.-,Procedure,a%20blue%2Dblack%20color%20appears.
https://www.washingtonpost.com/business/economy/crane-has-provided-the-paper-for-us-money-for-centuries-now-its-going-global/2013/12/13/9aa4190a-5c39-11e3-be07-006c776266ed_story.html https://carnation-inc.com/blogs/money-handling-blog/why-counterfeit-pens-are-not-reliable