Lomiko’s Graphene 3D Lab Files Patent for Multiple Material Printer Filament
http://www.freerepublic.com/focus/f-news/3113868/posts
This author doesn’t seem to know much about graphene. Another form of carbon, Graphite, is pencil lead.
Ping
... change the crystal structure of graphene, more commonly known as pencil lead
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Minor point here ,, pencil lead is not graphene but graphite ,, same substance but a different form ... also “pencil lead” is a mixture of graphite and clay ,, not a single substance...