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第七十七章 拉皮条(1 / 2)

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感觉时间差不多时,张好古将其取出并放置于铜盆之中。待其自然冷却后,他小心地加入醋酸,不敢有丝毫马虎。由于担心添加过多会毁掉材料,他亲自拿起一根短木棍搅拌起来,动作谨慎而专注,缓缓地掺和着醋酸,确保每一滴都恰到好处。直至搅动变得困难,张好古才停下手中的棍子,凝视着盆中的那点白色胶状物。他小心翼翼地捞出这珍贵的物质,原本计划亲自挤压,但由于之前搅拌时用力过猛,手腕已无力气。无奈之下,他只得请他人帮忙,使用两块铁板反复挤压,并不断用干布吸水。经过一番努力,当感觉水分已经被充分吸收后,张好古兴高采烈地拿起乳白的蒲公英胶,尽情地揉搓着。此刻,他的脸上洋溢着满足和喜悦,仿佛整个世界都因他而绽放光彩。

然而,还差最后一步——生胶变成熟胶。于是,他吩咐人找来木炭,然后用两块厚度约为两厘米的铁板夹住蒲公英胶。在铁板的两面都放上了木炭,并用杠子紧紧压住铁板两侧。接着,张好古伸出手指轻轻触碰铁板,感受它的大致温度,以避免过热导致焦糊。他心中暗暗发誓:“等玻璃制作成功,一定要制造出温度计!”

等待的过程是煎熬的,张好古站在一旁焦急地看着眼前的铁板,心中默默祈祷着实验能够成功。时间一分一秒过去,慢慢地,他闻到了一股熟悉的橡胶特有的味道。这股原本应该让人感到刺鼻的气味,此刻却让张好古感到格外亲切和兴奋。

随着时间的推移,张好古感觉差不多到时候了,便迫不及待地打开了铁板。他定睛一看,只见中间那块乳白的蒲公芵胶正散发着诱人的光泽。张好古激动得心跳加速,完全顾不得滚烫的温度,伸手拿起一块胶,仔细观察着。

他用手撕了撕这块胶,感受到它的弹性十足,松开手后又迅速恢复原状。张好古喜出望外,立刻找来了一把锋利的刀子,小心翼翼地切下一段长条状的胶。他双手紧紧握住这段胶,用力一拽,竟然将其拉长了好几倍!等他松手后,发现胶条并没有完全恢复到最初的形状,而是稍微变长了一些。张好古明白,这意味着橡胶还没有熟透,但即便如此,这种替代品已经具有相当不错的性能了。

虽然目前的产量较低,但总算是找到了一种可以替代橡胶的材料。只要以后能找到橡胶树并大量种植,产量自然会大幅提高。毕竟,现阶段对橡胶的需求并不大。

与此同时,一旁的宋应星、方以智等人惊讶地看着张好古在那里摆弄着橡胶替代品,仿佛在表演一场神奇的杂耍。他们目睹张好古将那条橡胶皮条拉得老长,然后突然松开一只手,只见那皮条猛地反弹回去,发出“啪”的一声脆响。众人不禁惊叹不已,对这个新奇的玩意儿充满了好奇和期待。

宋应星看这皮条的弹性这么好,就问张好古是不是可以当做弓弦用,张好古告诉他不行,但是可以做弹弓,张好古不由的想起小时候玩的弹弓,打石子,打钢珠,并且告诉宋应星,能打到七十多丈。当做武器,威力也是不小。等把橡胶做出来,就做把弹弓玩。

张好古决定把这橡胶叫做草胶,因为是用草做出来的。并简单给众人说了说用处,封闭,眼下的蒸汽锅的密封就能用上,还有车轱辘,在车轮上套上这么一层草胶,就不会像现在这么颠簸了,而且车轮也不容易坏了,还可以做成水囊,行军时随身带着。最后又说了一句,“还有许多用处,到时候你们自己去找找。下一步扩大生产量,具体事宜由宋大人安排。”

当众人出了实验室门时,看到外面已是满天繁星,这才知道这已经是晚上了,怪不得是饿的前胸贴后背。宋应星吩咐让人去伙房通知今晚加餐,张好古也一起去了伙房,等吃完饭再走,忙活的时候不觉得饿,这一闲下来觉得饿的受不了。

众人来到伙房坐下,张好古和机械厂的几个主要负责人坐在一张桌子旁。这时候,张好古才想起自己此行的目的,转头对方以智说:“密之,你多久没有回家了?你姑姑已经找上门来了。”

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