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Invisible Ink Pen

1.1.1 by ExceptionBond

2022年10月23日

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關於Invisible Ink Pen

隱形墨水筆——隱藏你最深的秘密

Invisible ink pen contains a special type of ink made from naturally fluorescent chemicals or organic compounds. When you shine a UV light down on a message or drawing made with invisible ink, the electrons within the ink’s fluorescent molecules are excited, briefly shifting to a higher-energy orbit around their nuclei. When those electrons shift back to their normal orbit, the absorbed energy is expelled in the form of visible light.