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如何計算書籍的書脊厚度

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-10-03 | 715 Views | Share:
在出版印刷工作的實踐中,經常要涉及書背厚度的問題,例如:書籍背上文字大小的設置,我們也經常碰到“書背文字或小圖不在中間的現象”。在生產中常通過下列方法計算書籍厚度。

如何計算書籍的書脊厚度

在出版印刷工作的實踐中,經常要涉及書背厚度的問題,如:書籍背上文字大小的設置,我們也經常碰到“書背文字或小圖不在中間的現象”。在生產中常通過下列方法計算書籍厚度。


(1)一般平裝書書背厚度的計算,
書厚=一張紙的厚度值x張數(或頁碼數/2)

例如:一本書甲,55/m2紙張印刷,總頁碼數是512,每一張紙的厚度是0.08mm。則,這本書的厚度為:0.08mm×512/2=20.48mm。



(2)精裝書書背厚度的計算


①方()背精裝書背厚度等於這本書的平裝(書芯)厚度+
後環襯的厚度(每張環襯紙的厚度×4)+紙板的厚度(每張紙板的厚度x2)+書殼面料的厚度(每張面料的厚度×2)

例如:假設一本書乙,書芯厚度同上例,前後環襯用180g/m2膠版紙,每張紙的厚度是0.15mm,書殼用2mm厚的紙板,書殼面料用塗塑紙,每張厚度是0.3mm。那麽。這本書的厚度為:20.48+0.15×4+2×2+0.3×2=25.68


②圓背精裝書的厚度,實際是指這本精裝書圓背弧的長度值。
一般這個弧的圓弧為120度,與這個弧相對應的弦就是這本精裝書的直線厚度(方背厚度),此時的弦和弧之比是1:1.15

例如:上例精裝書乙做成圓背精裝書丙,則丙書的厚度=精裝書乙的厚度×1.15=25.68×1.15=29.53mm

如何計算書籍的書脊厚度
如何計算書籍的書脊厚度

(3)印刷廠書籍厚度經驗計算(僅供粗略估計書籍厚度)

0.135×克數/100×頁數(:頁數不是頁碼數)=書脊厚度(單位是mm),
例如:一本書用55g/m2紙張印刷,總頁碼數是512,
書籍大約厚度為0.135×55/100×512/2=19.008mm

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