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    So I'm getting paranoid right now. I normally write in black pen and I wrote a note on my hand at school. At the end of the day the ink was blue but I thought I maybe wrote in blue pen that day. But then the next day, the same thing happened again!

    So I told my friends and we tested writing in different black pens on our hands and after..3-4 hours, the black ink turned blue on my hand but there was no change on my friends' hands!

    Why is it that the black ink turns blue when I write on my hand guys!!

    Cus blaxk ink is usually made out of several colours.
    Can separate all the ink pigments out in something called Chromatography.
    Year 8 science basically.

    Posted from TSR Mobile

    Due to chomatography.
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Updated: January 20, 2016
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