Das Anamika, Research Scholar, Dr. Suneet Kumar, Assistant Professor
Division of Forensic Science, School of Basic and Applied Sciences, Galgotias University, Greater Noida, Uttar Pradesh, India.
A Brief Review on Invisible Ink: It’s Various Types and Examination Methods
Authors
Abstract
The analysis of ink in forensic examination has come up as a great challenge. There are a
number of techniques and processes available for ink forgeries. Some of them are tricky but
routinely practiced to commit crimes related to deeds, bills, cheques, will, contracts and
certain other financial documents. Invisible ink or magic ink is one of the modern technology
widely used for committing financial forgeries. It is of two types, erasable ink and
disappearing ink. Disappearing ink fades away without leaving any trace after few hours
upon exposure to CO2 (any other acid) in the air. Another type of ink is erasable ink which
can be easily removed by certain rubbers incorporated in each pen. The present review
represents the type, nature and different properties of invisible ink. Different techniques used
to decipher these invisible inks are mentioned.