(1) A copy of a typewritten page. In the days of typewriters, copies were made by inserting a sheet of carbon paper between two or more blank sheets of paper. The ink on the carbon paper ...

The paper outlining the work, "Network structure enabling re-use and near full property retention in CNT sheets recycled from thermoset composites," was published in the journal Carbon.

This box of carbon paper made by the Columbia Ribbon and Carbon Manufacturing Co was the way everyone kept copies of documents before computers and I have copies of short stories my father wrote ...