Possible Sources Of Cellulose Fibers example essay topic

The first historical mention of paper is 104 A.D. in China. The Empress of China at that time loved books and wanted to have a lot of them made. At the time everything was written on silk scrolls which were extremely expensive and time consuming to make. She wanted something cheaper and easier to use and so she asked one of her servants, a gentleman by the name of Tsi Lun to come up with an alternative.

He worked for over nine years experimenting with different things and finally came up with hemp, mulberry tree bark, silk and old fishing nets all ground up into a mushy pulp. I wonder how he ever thought of it; the history books don't say. The Empress was very pleased and Tsi Lun was elevated to a high rank in the court. Unfortunately for him, the Empress then asked Tsi Lun to spread malicious gossip about some of her enemies at court.

When the Empress fell out of power, those people were extremely angry with Tsi Lun and he was either put to death or forced to commit suicide. Strange, isn't it, how things go in the world? And, of course, all of this that I am sharing with you is just one version of history. Others will perhaps be able to give a different rendering. I have read many.

I like the story of Tsi Lun. Most people agree on that one. But, as for the spread of paper making as an art, well, there are different stories told. To gather such accounts and compare them falls within the discipline of 'Historiography', the history of the writing of history. (If you ever want to scramble your brains and loose all concept of the solidity of reality, just study the writing of history.) The following, I believe, is most likely closest to the truth.

Papermaking remained a secret Chinese art until around the year 700 A.D. when, during a war with China the Arab nations captured an entire town of papermakers and took them back to the middle east as prisoners where they were forced into labor making paper. The craft was learned a couple hundred years later by Westem Europeans during the Crusades. Curiously, the Church in Westem Europe initially banned the use of paper calling it a 'pagan art' believing that animal parchment was the only thing 'holy' enough to carry the Sacred Word. That strange prejudice lasted for more than 100 years, but they got over it. In the 17th century Europeans were making paper from cotton and linen rags. When paper is made wholly or in part from cotton or linen fibers it is called 'rag bond'.

Rag paper is extremely durable and long lasting. An increase in literacy in the 18'th century and the resultant explosion of print caused a rag shortage for making paper and research began to find an alternative source of fibers from which to make paper. The industry, unfortunately, turned toward trees which were rather abundant at the time but getting rather scarce today because of our love of the use of paper. The reason trees were choose was their cellulose content.

Cellulose is actually the stuff out of which paper is formed. All plant matter has cellulose fiber. Some more so than others. Trees have a lot of cellulose. Why Cellulose? Cun ously, the answer lies in the molecular structure of cellulose and water.

It is a very interesting story that borders on magic and wizardry. Water molecules have one large proton and two little electrons. You could think of an image like a Mickey Mouse head with two ears and you will have an image of a water molecule. Water molecule electrons have the habit of chaining together on the surface of water, which causes an effect called 'surface tension. ' You could imagine a series of Mickey Mouse heads joined together at their ears and you will have a picture of how this works.

This chaining process is the key to making paper. Cellulose fibers have one large proton and one electron with a place on the proton for another electron to 'chain in' (a Mickey Mouse head with only one ear). When cellulose is suspended in water the water molecules do not discriminate against the cellulose molecules and include them in the chain which creates a glob of watery cellulose. Paper makers catch this glob of stuff in a screen, allow the excess water to drain off and press the soggy cellulose (now called 'water leaf' paper) flat. As the rest of the water evaporates out of the 'paper', the chain effect transfers to the cellulose alone and the whole business ends up taking on a solid form (cellulose chained together at the molecular level due to the initial interaction with water). Amazing, isn't it?

To watch pulp screened out of a vat, then see it pressed and turn into a solid thing borders on a kind of magical experience. Children love to make paper. So do adults, for that matter. All plants are composed in part of cellulose. Cotton and flax have high cellulose contents, as do trees. Spinach, lettuce, lawn grass, or common weeds from along the roadside are all possible sources of cellulose fibers.

However, the amount of cellulose fiber in any plant is variable and in some only very slight. Which means that to make a sheet of paper might require pounds and pounds of initial organic material that then must be boiled in lye (a caustic acid which dissolves the vegetable matter and can also dissolve your skin if you get it onto yourself) and leaves only the cellulose, along with, unfortunately, a lot of toxic waste water as well. (That's why there's such a toxic plume of pollution around paper mills. The process described in this web site is recycling, which does not add to the pollution in the environment.

Natural fiber paper makers have told me that they neutralize their caustic solutions with vinegar and baking soda. After the cooking process, once it is neutralized and checked with a litmus strip, the fiber cooking water can be disposed of down the drain without any fear of adding to the toxic waste in the environment, so there is hope.) The sad tale of our time period for the health of the eco system is that just as cotton and linen rags as sources for paper making were becoming scarce in the 17th century, trees in the 21st are also disappearing. As an example, one single edition of the Sunday New York Times requires 30,000 acres of trees. And that's just the New York Times.

What about the London Times? L.A. Times? And the millions of other papers printed around the world? Experiments have begun to find alternative sources of fiber and I have recently heard the European mills are turning toward hemp. Hemp yields 4 times the amount of cellulose fiber per acre than trees and is renewable within a year or two compared to 100 years for trees. As a lover of trees, I hope the rest of the world soon follows the European example.