Using invisible ink with glasses will help you to read hidden marks. Magicians often use these markings in their tricks. The markings may be invisible to the naked-eye, but they can be seen using UV lights or the right sunglasses. These invisible ink pens can be used to write secret messages, which are only visible under certain conditions. For example, when the paper is heated up or exposed to specific chemicals. These pens can be used to send information that you do not want others to see, such as passwords and your roommate’s number.
The duration of invisible ink depends on the type of the ink, and the conditions in which it is stored. Some invisible inks are phosphor based and use UV light to make the message appear. These inks last for years, but are difficult to see unless you have a special UV lamp or sunglasses that block out UV.
Since ancient times, invisible ink is used to transmit secret messages. It is a fun way to perform magic and hide information. You can purchase invisible ink pens from many gift and novelty shops or online. You can also make your own invisible ink using a variety recipes. There are many options for making invisible ink, including lemon juice, wine and vinegar or milk, cola or even body fluids.