1Research Scholar, Division of Forensic Science, School of Basic and Applied Sciences, Galgotias University, Sector 17A, Greater Noida, Uttar Pradesh, 203201, India
2Scientific Officer, Forensic Science Laboratory, Mahanagar, Lucknow, Uttar Pradesh, 226006, India
3Joint Director, Forensic Science Laboratory, Niwari, Gaziabad, Uttar Pradesh201204, India
4Senior Scientific Officer Gr. I, Directorate of Forensic Science Services, Ministry of Home Affairs, CGO Complex, Lodhi Road, New Delhi, 110003, India
*Corresponding Author: Das Anamika, Email: anamikasingh.07.01@gmail.com
Online published on 2 November, 2022.
Invisible ink are becoming a popular tool for committing various economical and financial frauds. Temperature dependent erasable ink and pH indicator disappearing ink both are widely used for this purpose. In this research paper we have explained different techniques to decipher these invisible writings. Examination through Photoshop software and U.V. Cabinet are very cost-effective, non destructive and easily available technique to decipher these writings. Chemical examination through iodine fuming, NaOH or KOH are also very effective and reliable method but they are destructive in nature. Visualization of invisible writing is best done by viewing the samples under the spot light and U.V. light available in Video Spectral Comparator -8000.
Ink analysis, Disappearing ink, Questioned document, Forensic science, Invisible ink, Erasable ink
