Little riddles
Like sugar is not sugar
There are circles and squares
Help you fix typos
I'm not afraid to get dirty
- Playing a stationery
I believe everyone has guessed it,
The mystery is the eraser.
As one of the most common stationery,
We inevitably had "intimate encounters" with them.
And how much do you know about erasers?
Let's nag the story of the eraser together today!
Before the invention of the eraser,
People use sponges or bread to wipe words.
The sponge is soft and porous,
The erasing effect is not obvious.
How effective is the bread erased?
You can try it for yourself!
Until 1770,
British scientist Priestley made a surprising discovery:
Natural rubber can actually erase the pencil word,
But the fly in the ointment is that
When you use it to erase words, the end of the pencil is glued to the rubber,
The more you rub it, the dirtier it gets.
However, at this time in another part of england,
Engineer Edward Naime claimed,
Once by chance, rubber was mistaken for bread,
And found:
It works well to erase typos!
And began mass production and sales of erasers.
He is also considered the inventor of the eraser.
In addition to getting dirtier and dirtier,
Because the rubber is not processed,
Early erasers decay easily.
By 1839,
Inventor Charles Goodyear discovered,
After the rubber is vulcanized,
it will be easy to fall off the chips,
The end of the wiped-off pencil leaves the eraser with the debris,
The eraser can be kept clean,
It won't stain the paper.
So
The eraser is officially born!
In 1858, Lippmann of Philadelphia, USA, obtained a patent.
- Embed the eraser in the end of the pencil.
Later, this pencil was judged to be
"Just embed two existing things together instead of a new product"
And the patent is canceled.
With the development of technology,
There are more changes in the type and form of the eraser,
It gives us more options and experiences.
Finally, I secretly asked,
Have you run out of erasers?