• Question: Whats Inside Rubbers To Make Pencil Writings Disapear After Rubbing It On the Writing?

    Asked by issi2001 to Anil, Blanka, Cees, Emma, Mike on 3 Jul 2012.
    • Photo: Emma Trantham

      Emma Trantham answered on 3 Jul 2012:

      Rubbers can be made from actual rubber or from different types of gum.

      When we write with a pencil the pencil line we draw is actually a layer of graphite on the paper.

      I think rubbers work because the material they are made from is much better at sticking to graphite than paper is and so they are very good at wiping off this layer of graphite without destroying the paper.

      Does that answer your question?