It’s a common pastime to write secret messages in invisible pen, whether it’s just for fun or as a prank on friends. What if they could be deciphered with a special set of glasses? In this Wonder of the Day we will show you how to create and use these magical ink glasses.
Invisible ink is liquid that can be seen under certain conditions. It usually becomes visible when exposed to light. It’s often used to mark poker cards or other cards, but can also be used on other surfaces. The luminous reader invisible ink marked card is a great way to cheat on many casino games including Omaha Hi-Low and Baccarat.
Heat-activated ink is the most common type of invisible ink. It can be made using a wide variety of organic liquids, such as lemon juice, vinegar or clear soda. It can also be formulated from other chemicals that change color when heated, such as those found in the blood of a corpse or the saliva of a cranberry. It can also be sprayed directly onto paper, dried and then rubbed down with iodine.
Most of these heat-activated invisible inks can be revealed by placing the paper under a light source, such as a 100-watt bulb or a hair dryer. It’s important not to burn the paper. This is why a heat-proof plastic sheet is recommended for laying the paper on.
Other forms of invisible writing require the application a chemical or substance in order to reveal the messages. For example, soapy or warm water can be applied to reveal a message written in lemon or iodine to reveal messages on a smear. These types are often called sympathetic inks.
Invisible ink has been around for many years. It’s especially useful when communicating with people that might not be able see what you write, such as those who are blind or hard of hearing. It can add a little excitement to your daily text messages by breaking up the monotony from an endless stream social media notifications and workplace emails.