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第137章 创新才是文明发展的基石(2 / 2)

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为了安全考虑,我又让智伯给每个灯,配了一个灯罩,不用时把灯罩罩上,防止出现火灾,

现在他们知道了火柴的重要性和方便性了,我也提醒了篌,把火柴棒再次缩小,现在他们做的火柴,才是真正民用火柴,这是后世用的火柴稍微打了一些。

看他们都有发明,夲樱急了,晚上也不睡觉,抱着个脑袋在那使劲想,我怕她把脑袋想坏了,只好帮帮她,让她到篌那边要来一些硝石,教她用硝制兽皮。

让她拿来一张这几天刚剥下的兽皮,先整理兽皮:将兽皮放在清水中浸泡4~5小时,使它柔软,然后用刀刮去附在皮板上的残肉和污物。

再放在温热的石灰水中清洗干净。

鞣制:用硝石,食盐和水,按3∶1∶6的比例配成鞣制原液(厚皮需多加一些硝石)。使用时,将1份原液对7份水,盛在盆内浸没兽皮。以后每天逐渐加多原液,浸液逐渐加浓,以防止兽皮骤然紧缩而影响质量。

浸渍时要勤翻兽皮,以免浸渍不匀。兽皮是否熟好,可用手绞紧一角,如果呈白色不透明,则说明已经成熟。

处理工作:将已熟好的兽皮从浸液中取出,用框架绷好,放在通风处阴干。到八成干时,取下用手揉搓,直到兽皮已柔软为止;再用铁器磨擦兽皮的光面,兽皮的毛和皮板都非常柔软时,最后用梳子轻轻将毛理顺即可。

她现在识字最多,我只要把这些步骤写下来,她自己记牢就可以自己操作,所以这个硝制兽皮的发明就算在她头上了。

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