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About 7.5 squares of toilet paper is sufficient.
But for round paper rolls, we unconsciously use more than the necessary amount, so the actual amount used is larger. Therefore, by giving it the edges, it takes more conscious effort to obtain the squares, preventing waste.
HanBat National University
the Department of Industrial Design
Daejeon, South Korea
Hanbat National University
the Department of Industrial Design
Daejeon, South Korea