Why does the clear ink in a UniBall Fusion pen turn black when it is used?

Subject: Why does the clear ink in a UniBall Fusion pen turn black when it is used?

Date: Thu Jan 29 10:23:29 2004
Posted by Mary Helen
Grade level: 4-6 School: Friendship Central School
City: Friendship State/Province: N.Y. Country: Unites States
Area of science: Chemistry
ID: 1075393409.Ch

Message:


You can see the clear ink in the pen, but when you write it changes color.  I 
have one and my students wondered how it worked.  Thank you

Re: Why does the clear ink in a UniBall Fusion pen turn black when it is used?

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