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Old 03-30-2016, 01:18 PM
Mangetout Mangetout is online now
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Join Date: May 2001
Location: England
Posts: 57,076
Originally Posted by Ludovic View Post
I've found something similar, that pencil erasers do not actually erase these days. Far from being degraded, they are some sort of ultrahard rubber that builds up a layer of graphite on its tip and then smears it all over the paper.
I think that might be what jtur88 actually meant by 'degrade' - the rubber dries out or continues curing after manufacture, or something.