Invisible ink refers to a liquid that can be written on paper but cannot be seen by the naked eyes until it is exposed either to a chemical reaction, or another source of illumination. These inks can be used to write secret messages, which can only be read with a special pair or glasses.
The easiest way to see the writing is with a camera or camcorder equipped with an infrared sensitive lens. You can do this by placing ink on a flat surface and then using an infrared light source to illuminate the ink. The ink absorbs the light and emits it as dark marks on paper.
There are many kinds of inks available that can be made invisible when they are exposed to certain light or chemical reactions. These inks come in a variety of styles, from simple ink that can easily be written on a piece of paper with a pen to more complex inks that require a camera to see the message.
This ink is popular and effective for spying. It can be used to record confidential information such phone numbers or bank account numbers. It is also very useful for those who want their friends to not see sensitive information on their personal emails or social media pages.
These inks are created by varying the properties of the liquid they are made from. Some inks can be made invisible with a limited amount of chemicals, while others can be seen under a specific light wavelength.
The most popular type of ink is luminous. This ink can only be seen through a special filter placed inside a pair of sunglasses. This filter will add a red tint to the ink, making it standout from the rest.
There are many types and styles of luminous-ink readers. The most common is magic ink glass. These glasses are similar to regular sunglasses but have a layer of red filter film on them.
A luminous pen is another type of luminous-ink reader. This pen is designed to be invisible to the naked eye and can be seen by a camera or camcorder that has an infrared sensitive filter. This ink can be made visible by a chemical reaction, which occurs when it is exposed to heat or light.