Invisible Ink Visualization Glasses are a pair of sunglasses that allow you to see invisible markings on marked cards. Typically, these glasses have a red filter on them that cuts out blue and green light, letting only the infrared light through, which makes it easier to read the marks on the cards. In addition, these glasses are designed to protect your eyes from harmful UV rays and reduce digital eye strain.
Invisible ink (also known as security ink) is a substance used to write that is invisible either upon application or soon afterward, but can later be made visible through some means. Traditionally, invisible writing could be detected by heat, reaction with phenolphthalein, viewing under ultraviolet light, or placing the page inside an iodine fume cupboard. However, with the advent of technology, there are safer, simpler, and more secure ways to view invisible ink.
UV protection glass is a type of window film that allows UV rays to pass through the glass but blocks them from reaching the interior of the room or building. It is often used in museums and other buildings to protect objects from harmful UV rays, as well as in offices and homes to prevent the fading of artwork and other objects. UV protection glass is also a common feature in sunglasses.
Invisible ink pens are useful for writing information that you don’t want strangers or even roommates to discover, such as passwords for your online accounts or secret crushes. Invisible ink pens are available in many different varieties, each with its own unique color or coating to make it more difficult to see.