Invisible Ink and Contact Lenses

Invisible ink, also known as invisible ink, is a special ink which can only be seen under certain conditions. It can be revealed with heat or light and is often used for secret messages that others cannot read. This is an effective way to protect your privacy. For example, you can use it to hide your social network passwords and your roommate’s number. Invisible ink and contact lenses are two of the most effective ways to hide information from others. Invisible ink can also be applied to eyeglasses to make them see invisible marks on the back of marked cards, which can help you cheat at poker games.

There are many kinds of luminous ink marked cards reader in the market, so how do you choose which one to buy? Firstly, you should check the center thickness of the lens. The central thickness of the lens should be 0.06mm. This will allow you to see the invisible ink marks that are on the backs of marked cards. The lens should also be comfortable to wear. The more comfortable a lens is, you will be able to use it for longer periods.

Some people want transparent UV invisible mark reading contact lenses. However, such products do not exist at the moment. Some manufacturers will say that their products have this feature, but they are liars. No perspective effect is possible if there’s no ultraviolet light. The lens color will not change the color of your eyes.