There are several reasons why some of the printed material needs to be kept confidential and out of the public eye. They can be secret or even classified information. Most industries that use this form of ink or printing method are cheques, tamper-evident labels, passports, product authentication, postage stamps, and even identity cards. The primary objective of utilizing security printing is to prevent any kind of forgery. However, it also helps in avoiding any form of counterfeiting or tampering.
Nowadays, with the increase in demand for such documents, they are now available to commercial printers. Some of the common methods these commercial printers use are flexographic presses or conventional offset; however, newer digital platforms have also been introduced.
How does it work?
The security ink used on these high-value documents contains a pigment that changes the color of the light by absorbing only specific wavelengths. For example, if you are using a red fluorescent pigment powder, then only the red component will get reflected once it has been hit with visible light. This way, you can only see the color red.
Even though this process seems simple, there is a lot of thought that gets put into making this work. The performance of the pigment majorly depends on the composition of the ink. The size of the pigment particles significantly impacts how well it sticks to the surface and avoids wear. However, you should always choose a pigment that has regular particle sizes since irregular once is relatively less consistent.
What are some kinds of security pigments you can choose from?
With the advent of technology, pigment suppliers have been able to create various dyes, powders and inks that fulfil different requirements. Further mentioned below are a few:
Backlight invisible pigment:
This kind of UV printer ink only becomes visible when it gets put under certain specific light wavelengths. This kind of ink s predominately used for printing money and is perfect for any hidden security applications.
Organic fluorescent pigment:
Such a kind of pigment can be easily derived from natural or synthetic precursors, and feature carbon-based molecules. The amazing chemical structure makes this pigment easily produce different ranges of colors for different applications. Along with that, this kind is very cost-effective as well. Its relatively low price makes it one of the most bought pigments from security pigments supplier.
This article provides you with an in-depth knowledge of security inks and how they function. However, before choosing the kind that suits your needs, you should definitely do some research. This will not only help you know about the different options but also help you choose the best one that suits the purpose.