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橡皮擦的蓝色一面:我们揭开了这个秘密 - Practical Tips

橡皮擦的蓝色一面:我们揭开了这个秘密

by Corinna

每个人都知道有红色和蓝色两面的橡皮擦。但几乎没有人知道蓝色面到底有什么用。我们将告诉你这两种颜色背后的酷炫诀窍是什么。

橡皮擦的蓝色面有什么用?

橡皮擦的蓝色面比红色面更粗糙、更硬。但它到底是干什么用的呢?

  • 我在学校的时候,总有一个传言说蓝色的一面可以擦掉墨水。然而,这无法真正证明或解释。
    学生们一直怀疑的事情其实是真的:橡皮擦的蓝色一端应该可以清除墨水。其原因是一种特殊的成分。

橡皮擦的蓝色面如何工作?

橡皮擦的两侧有何不同。

  • 当你用铅笔在纸上写字时,小块的石墨会粘在纸上。这种情况的发生是由于所谓的 “粘附力”。然而,橡皮的红色面会产生更大的粘附力,这样石墨就会从纸上脱落。
    • 橡皮的蓝色面是由与红色面相同的材料制成。但是,加入了磨细的玻璃、石英或浮石。由于墨水能适当地渗透到纸张中,所以无法从表面上清除。因此,橡皮的蓝色部分会从纸上去除整个层次,从而损坏纸张。

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