Invisible ink is a type liquid that can be written onto paper but cannot be seen until it is exposed or to 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 most common way to see the writing is by using a camera or camcorder that can be used with an infrared sensitive filter. This can be accomplished by placing the ink on a surface and then illuminating the ink with an infrared light source. The ink absorbs the light and emits it as dark marks on paper.
There are many types of inks you can make invisible by using a certain chemical reaction or light. 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 very popular for spying and can be used to record sensitive information such as phone numbers and bank account numbers. It is also useful to those who want to keep their friends from seeing sensitive information on their email accounts or social network pages.
These inks can also be made from liquids with different properties. Some inks are made with a specific amount of chemicals to make them invisible while others are made with special formulations that allow the ink to be seen under a particular light wavelength.
One of the most popular types of ink is luminous ink, which can only be seen with a special filter that is placed in the lens of sunglasses. This filter will give the ink a red tint to make it stand out from its surroundings.
There are many types available for luminous ink readers. Most common is the magic ink reader. These glasses look like regular sunglasses. They also have a red filter coating on the lenses.
Another type of luminous ink reader is a luminous ink pen. This pen is invisible to the naked eyes and can be seen using a camera or camcorder with an infrared sensitive sensor. This ink can be made visible by a chemical reaction, which occurs when it is exposed to heat or light.