why will an eraser rub out writing from a graphite pencil but not from a coloured pencil ?
The eraser is misnamed. In fact it removes a layer of paper that contains the graphite. Crayon is a wax and the action of an eraser only serves to spread the wax over a wider area and therefore appears not to work.
Also graphite is to some extent absorbed by rubber compound…wax is not.
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Zinka Colored Sunblock Zinc Nosecoat 2 Pack Bundle .6oz Tube – Pink Yellow $10.42 Great for those extended days out in the sun!! Zinka Nosecoat offers the absolute maximum protection available from the sun’s harmful rays, this formula not only looks cool but it provides the highest sun protection possible. Zinka’s proven formula withstands the most extreme weather conditions performing flawlessly in wind, hot, cold & wet. Zinka Nosecoat works as a sunblock not as a “sunscreen” … |
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Marie-Antoinette Dauphine ( in French )
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This entry was posted by adminbr on Wednesday, March 23rd, 2011 at
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