Building and civil
Signatures and the page plan — collation marks step down the spine
Signatures and the page plan: collation marks step down the spine, so one signature out of order breaks the staircase — an inspection turned into a shape
This drawing comes from one YAML file. No shape was moved by hand.
Notes in the source (in Japanese)
本は、ページを 1 枚ずつ重ねたものではない。全紙 1 枚に 16 ページを刷って、折って、束ねたもの。だから総ページ数は折丁の倍数になる(192 = 16 × 12)。
背標は、重ねたとき階段に並ぶ。 折ごとに印の位置を少しずつ下げてあるので、1 折でも入れ違うと段が崩れる —— 本を開かなくても、背を見るだけで分かる。
検査を絵にした仕掛け。 数えるのではなく、形が合っているかを見る。
Source (YAML)
examples/gallery/229-折丁と台割.zumen.yaml
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