When the shareholders of a company decide to change the legal person, they must sign it with ink pen? The manager said that some shareholders had signed it with a ballpoint pen before, and now they have to sign it again. have Because the carbon ink used for pens is not easy to fade or dissolve in water and oil, it is suitable for long-term storage. Therefore, it is effective to use a pen or black charcoal pen in formal occasions. . . The ink used for ballpoint pen is soluble in oil, so it can't be used. This is one of the effective methods to prevent tampering.