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Radium tape is a type of adhesive tape that was impregnated with radium salts, which are radioactive. The radium in the tape was used to create a glow-in-the-dark effect due to its radioactivity. This property made radium tape highly valued in the early 20th century for various applications requiring visibility in low-light conditions. The tape was applied to surfaces or objects to provide luminescence, ensuring that they could be seen in the dark. Luminous Tape Self-adhesive Glow In The Dark Safety Stage Home Decorations Warning Tape Glow In The Dark Safety Stage Home Decorations Warning Tape item: Home Decoration Luminous Tapes Glow in the dark, no need of power energy, energy conservation, environmental protection, bright warning labels can also beautify the environment effect; Also has the waterproof, sunscreen, strong corrosion, self-adhesive, etc.; And virulent insipidity, no radioactive elements; Construction is convenient and simple.