Invisible, colorful visualization, word removing and office printing pens

Abstract

The invention discloses a composite pen with functions of invisible pen, disappearing ink pen and, color chromogenic pen and copying pen, which comprises a hollow pen holder and two pen refills inserted into both ends of the hollow pen holder, wherein the exposed ends of the two pen refills are respectively inserted into pen tips; caps are respectively sheathed on both ends of the hollow pen holder; an invisible ink and a word disappearing agent are filled in one pen refill; a word disappearing agent, a developing agent and a copying agent; the invisible ink contains ethanol, phenolphthalein or thymolphthalein and water; the word disappearing agent contains sodium sulfite or potassium sulfite and water; the developing agent contains water, acetic acid or citric acid, or sodium hydroxide or sodium carbonate; and the copying agent contains hydrogen peroxide. The tips of the two pin refills can write invisible words respectively, and the words written by the two pen refills can be developed by mutually smearing. The tips of the two pen refills can independently eliminate writings of blue pen, red pen or neutral erasable pen, and pens and neutral erasable pens can be used for writing at positions where the words are eliminated.

Description

technical field [0001] The invention relates to a pen, in particular to an invisible, color-displaying, erasing and copying pen. Background technique [0002] At present, the existing invisible pen and the erasing pen are used separately, and each has a separate formula. The existing invisible pen only has the function of invisibility and monochrome display, and does not have the function of erasing; while the erasing pen only has the function of erasing The writing function does not have the invisible and visible functions, so that when used at the same time, the invisible pen and the erasing pen need to be replaced frequently, which is extremely inconvenient; moreover, the position after the erasing can no longer be copied with a fountain pen and a neutral erasable pen. Contents of the invention [0003] The purpose of the present invention is to provide an invisible, color display, erasing and copying pen, which has four functions of invisibility, color display, erasing...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing invisible pen and the erasing pen are used separately, and each has a separate formula. The existing invisible pen only has the function of invisibility and monochrome display, and does not have the function of erasing; while the erasing pen only has the function of erasing It does not have the function of invisibility and visualization, so it is very inconvenient to frequently replace the invisible pen and erasing pen when using it at the same time; moreover, the position after erasing can no longer be rewritten with a fountain pen and a neutral erasable pen

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