TheOpenBook.in is a platform for students and teachers to get education materials. We have more than 2000 of worksheets and more than 100 of videos. We publish monthly 8 videos in youtube.
Subscribe to our Channel : [ Ссылка ]

Facebook : [ Ссылка ]
Subscribe : [ Ссылка ]
Add Us on Google+ : [ Ссылка ]...
Twitter : [ Ссылка ]
blogger : [ Ссылка ]

The evolution of paper
The common white object that we all use today is something taken for granted but it has a long history.
We shall trace the genesis of paper here.
Paper as we all know it today is derived from papyrus and its origin can be traced back to the Han dynasty.
The type of paper they made was from hemp and it was coarse, uneven and thick. This was known to man from excavations from a Han tomb.
Sometime in 104A.D. a eunuch Cai Lun in the Han dynasty tried his hand at making paper. He took bamboo fiber and added the inner bark of the mulberry tree. He pounded them together adding water. When it was pounded well he let it drain on a flat cloth and when this dried only the fiber remained. The man realized he had stumbled upon a material which could be used for writing. It was light weight. In course of time he used other material too to make the same and he presented them to the Emperor of the time in 105A.D. and that according to Chinese history was the making of paper.
What prompted him to use lightweight material was that earlier used material was difficult to carry as they were heavy.
Slowly this was brought to other countries by the Chinese travelers and paper became a common product. The Arabs mastered the skill and soon made it popular everywhere.
Paper is nearly 2000 years old. Not all paper is made from wood. Some are made from cloth. Our bank notes are an example of paper from cloth as they are more durable.
One tree can make a lot of paper. The general A size paper we use commonly was made in Germany in the 1920’s and adopted internationally in the seventies.
The largest handmade p paper sheet made was in Japan in 2009. Another interesting fact is that there is a limit to how many times a paper can be folded. This is because each time we fold it increases in thickness. The maximum record for folds is 13.
The art of paper folding origami was developed by the Japanese in the early 17thn century and came to the rest of the world in the 1900’s.
Paper aero planes were made and that was another use to which it was put.
We use a lot of paper every day and an average office worker uses almost10, 000 sheets of paper every year.
It’s indeed strange that what we assume as normal has such a wonderful history behind it. #Education #Educationalvideos #CBSE #Theopenbook

свернуть