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[–] 8 points 4 months ago (5 children)

The blue part is not intended for use on normal paper. I don't know how how the paper it's intended for is called in English, but it is the thick, transparent paper used by architects and engineers.

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  • [–] 8 points 4 months ago

    Architects and civil engineers used to use thin transparent papers, that could be folded or rolled-down much better than normal paper.

    Graphic designers used to use thicker paper, and of course, people always drew on wood, metals and other kinds of consumables.

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