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第一百零六章 四大发明(二)(1 / 2)

加入书签 | 推荐本书 | 问题反馈 |

我寄相思与明月:哇哦,棒棒哒!涨姿势了!

扶菱:???

我寄相思与明月:啊不是,我是说涨知识了!歆姐你不要在意!

扶菱:最好是这样!我一直都在!

我寄相思与明月:歆姐放心!我不敢!

晚宁睡不着吖:好啦,换个话题!我们不是在说四大发明吗?

我那迷人又短命的老祖宗:同意!

......

苏玥点开评论区,说:“啊?你们干什么了?一直要换个话题?”

晚宁睡不着吖:没什么,你赶紧讲下一个!

不许人间见白头:对!赶紧讲!

......

苏玥有些无语,毕竟她好不容易主动挑起话题结果他们都无视,只好说:“好,那我们就好好看看下一个!活字印刷术!”

用胶泥做成一个个规格一致的毛坯,在一端刻上反体单字,字划突起的高度像铜钱边缘的厚度一样,用火烧硬,成为单个的胶泥活字。

为了适应排版的需要,一般常用字都备有几个甚至几十个,以备同一版内重复的时候使用。

遇到不常用的冷僻字,如果事前没有准备,可以随制随用。

为便于拣字,把胶泥活字按韵分类放在木格子里,贴上纸条标明。

排字的时候,用一块带框的铁板作底托,上面敷一层用松脂、蜡和纸灰混合制成的药剂,然后把需要的胶泥活字拣出来一个个排进框内。

排满一框就成为一版,再用火烘烤,等药剂稍微融化,用一块平板把字面压平,药剂冷却凝固后,就成为版型。

印刷的时候,只要在版型上刷上墨,覆上纸,加一定的压力就行了。

为了可以连续印刷,就用两块铁板,一版加刷,另一版排字,两版交替使用。

印完以后,用火把药剂烤化,用手轻轻一抖,活字就可以从铁板上脱落下来,再按韵放回原来木格里,以备下次再用。

毕昇还试验过木活字印刷,由于木料纹理疏密不匀,刻制困难,木活字沾水后变形,以及和药剂粘在一起不容易分开等原因,所以毕昇没有采用。

毕昇的胶泥活字版印书方法,如果只印二三本,不算省事,如果印成百上千份,工作效率就极其可观了,不仅能够节约大量的人力物力,而且可以大大提高印刷的速度和质量,比雕版印刷要优越得多。

活字制版正好避免了雕版的不足,只要事先准备好足够的单个活字,就可随时拼版,大大地加快了制版时间。

活字版印完后,可以拆版,活字可重复使用,且活字比雕版占有的空间小,容易存储和保管。

这样活字的优越性就表现出来了。

.......

苏玥解释道:“毕昇是用胶泥做活字印刷术,而后来发展成铜。毕竟胶泥嘛,我小时候玩过,干了之后特别脆,容易坏。”

扶菱:同意!小时候我姐姐拿胶泥给我做了一个爱心,结果一不小心掉地上了直接碎了,我当时伤心了好久!

晚宁睡不着吖:???胶泥是什么?

扶菱:啊这,你让我怎么解释?我就是在家里挖土的时候发现的啊!

云曦:对啊,这种真的不好说。不过我当时是从老家的大坑里面找到的,我家还真的没有。

晚宁睡不着吖:所以那是什么?

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