"Larry Jaques" wrote in message
...
Snip

And I learned early never to buy a gross of pencils. Erasers become
calcified and petrify before the -first- dozen is used up, so I get a
box every year at the back-to-school price of five cents.


I was reading a bout a better grade pencil that touted that it had genuine
natural rubber for the eraser IIRC.

Is there a difference in longetivity that you know of?

I recall using a white plastic eraser while I was taking drafting classes.