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紙豆腐內的紙張為什麼不會粘在一起?


中式紙的生產會用到一種工具,叫竹簾。它是利用竹青抽成很細的竹籤,用手工編織而成。竹簾的作用是瀝水、植物纖維經打槳分解再重新組合之後,在水槽內加入水稀釋,再加入植物膠,利用抄紙架及竹簾的組合,紙槳盪入後,師傅搖盪槳料,植物纖維一面沈澱,一面交織,而形成一張紙,沈澱的作用是利用竹簾中竹籤與竹籤之間的縫細,讓稀釋的水流下。



在此時師傅要決定紙張的厚度和纖維的方向,因為纖維交織是屬於平面的交織,所以成紙之後,師傅將它放置於置紙板,上一張紙與下一張紙之間纖維並無交集,互不相干(因為紙與紙放在一起纖維不會站立起來,垂直交織。)所以當形紙豆腐經過壓紙的作業,在紙張與紙張同樣無交集,所以不會粘在一起,濕紙如此,乾紙亦然。


當然不會粘在一起是在正常的情況之下,如果紙張太薄(結構很脆弱)或則添加藥劑不當亦會形成沾粘現象。


手工紙製紙會將濕紙疊放在一起再加壓,而機械製紙是抄好紙後,濕紙粘於毛毯馬上加壓馬上乾燥。



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Dec 05, 2023

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