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awesome e paper
Transcript of awesome e paper
The process of making paper has not changed – at least, fundamentally – since its discovery. But with almost two centuries of improvements and refinements, modern papermaking is a fascinating, high tech industry. E-paper Step 2: Debarking, Chipping and/or Recycling
To begin the process, logs are passed through a debarker, where the bark is removed, and through chippers, where spinning blades cut the wood into 1" pieces. Those wood chips are then pressure-cooked with a mixture of water and chemicals in a digester.
Used paper is another important source of paper fiber. Thanks to curbside recycling programs in many communities, we recover 40% of all paper used in America for recycling and reuse. The paper is shredded and mixed with water. Step 3: Pulp Preparation
The pulp is washed, refined, cleaned and sometimes bleached, then turned to slush in the beater. Color dyes, coatings and other additives are mixed in, and the pulp slush is pumped onto a moving wire screen.
Computerized sensors and state-of-the-art control equipment monitor each stage of the process. Step 4: Paper Formation
As the pulp travels down the screen, water is drained away and recycled. The resulting crude paper sheet, or web, is squeezed between large rollers to remove most of the remaining water and ensure smoothness and uniform thickness. The semidry web is then run through heated dryer rollers to remove the remaining water. Waste water is carefully cleaned and purified before its release or reuse. Fiber particles and chemicals are filtered out and burned to provide additional power for the mill. Papermakers carefully test for such things as uniformity of color and surface, water resistance, and ink holding ability. Step 1: Forestry
Typically, trees used for papermaking are specialy grown and harvested like a crop for that purpose. To meet tomorrow's demand, forest products companies and private landowners in Wisconsin plant millions of new seedlings every year. In the 1970 electronic paper was first developed by Nick Sheridon at Xerox Palo Alto Research Center.
It had black and white layers with the spheres which would create the image. It was called Glyricon.
There are other kinds of E-paper called: Electrophoretic display Electrowetting and Electrofluidic.
Electophorectic display forms images by rearranging pigment particles using an applied electric field.
Electowetting is based on controlling the shape of a trapped water/oil inference by an added voltage.
Electofluidic is a variation of Electrowetting. Electrofluidic displays put an aqueous pigment dispersion inside a small reservoir. And Rachel Soukup :) THE END Or is it? :D