Q:

How does invisible ink work?

A:

Quick Answer

Invisible ink is a solution or compound that becomes visible upon addition of another substance and can either be made through a chemical or physical process. For example, certain "invisible" solutions only require UV light to become visible, while others require the addition of specific chemicals to set up a reaction.

Continue Reading
How does invisible ink work?
Credit: Louise Murray age fotostock Getty Images

Full Answer

While soap-based ink is invisible when dried on paper, showing it in front of UV light causes it to show color. When looking at the ink with light of a lower wavelength, such as UV light, the ink glows. On the other hand, when the pH indicator phenolphthalein is used as invisible ink on paper, it is originally colorless. However, on addition of a basic solution such as ammonia, it turns pink and becomes visible.

Learn more about Chemistry
Sources:

Related Questions

  • Q:

    What is a rust inhibitor?

    A:

    A rust inhibitor is a type of substance or chemical compound that reduces the rate of oxidation. It also helps prevent early rust damage from occurring.

    Full Answer >
    Filed Under:
  • Q:

    What is a compound?

    A:

    A compound refers to any substance that contains two or more elements that have been joined together chemically. All compounds are molecules; however, not all molecules are compounds. Molecules such as O2 or H2 are not considered compounds because they only contain a single element.

    Full Answer >
    Filed Under:
  • Q:

    What is silver nitro oxide?

    A:

    There is no such chemical compound or substance as "silver nitro oxide." The fictional compound was part of a 2013 social-media hoax which claimed that scratch card tickets contained the allegedly carcinogenic material.

    Full Answer >
    Filed Under:
  • Q:

    What is the chemical name of C6H5NH2?

    A:

    The organic compound C6H5NH2 is referred to as aniline, phenylamine, benzenamine, or aminobenzene; it is a toxic substance that attaches an amino group to a phenyl group. Aniline is used in rubber processing, chemical and herbicide production and the manufacturing of pigments and dyes.

    Full Answer >
    Filed Under:

Explore