Carbon paper was also a key part of Samizdat production in the Eastern bloc: https://en.wikipedia.org/wiki/Samizdat https://en.wikipedia.org/wiki/Samizdat (whic

Carbon paper was also a key part of Samizdat production in the Eastern bloc: https://en.wikipedia.org/wiki/Samizdat https://en.wikipedia.org/wiki/Samizdat (which is why my family still has piles of it in the attic somewhere...)