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I thought it never took off as a mass produced material because mass production was rather difficult (read: expensive)

That said, apparently it's been going down in price quite rapidly by order of magnitude: https://www.graphenea.com/pages/graphene-price#.XyDfAGkpCNw

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It's amusing that they have a link to buy a square cm for $80 just above the graph showing that it will cost €0,1 in 2020.

In their shop, that’s just $76, and a square inch $113. Mounting on polymer film must be expensive, as, on copper, 15cm×15cm costs only €396 (less than $2 per cm²)

You get a coverage of “> 97%”, so it seems manufacturing isn’t that good yet (or, maybe, they keep the good stuff for themselves and sell the scraps)

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