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蛋殼、蔬果粉筆 寫下環保新頁
發佈日期 :2009-08-05

教室裡粉筆灰滿天飛的狀況可望改善,新興高中一年級菁英班學生魏少亭、何羽柔、王雅婷與王子彬將蛋殼加水及硫酸鈣,壓成環保粉筆,在黑板上寫字不輸傳統碳酸鈣粉筆。指導老師說,未來將把成分改成麵粉或太白粉,粉筆灰能夠吃下肚,環保又不危害身體。


魏少亭、何羽柔說,粉筆灰四處飄散是個大問題,蛋殼也是白色,若磨成粉狀,是否也可做粉筆?學生說,蛋殼較重,因此粉末較不會飄,一顆蛋約可磨成五公克粉末,粉末粗細會影響書寫品質。


至於顏色不能全部是白色,但要兼顧環保,研究團隊決定從食物中找顏色,綠色粉筆是加了菠菜汁、紅色是蕃茄汁、黃色為薑黃、橘色為辣椒。大概有半年時間,同學說:「除了在實驗室裡,就是去市場買菜」。


「找蛋殼很容易,但剝殼內的薄膜最困難!」王子彬說,蛋殼若沒剝乾淨,做出來的粉筆就會發臭,他們剝蛋殼薄膜剝到要抓狂!但不仔細,實驗就會失敗,過程相當艱辛。


 


資料來源:中時電子報甘嘉雯/桃園報導 2009-04-24 07:26


          http://n.yam.com/chinatimes/healthy/200904/20090424463294.html


 


The new page of environmental protection


 


Have you ever been bothered about the chalk powder? The chalk powder may fly anywhere, and the substance in it, is not good for health. The Xin-Xing(新興) junior high school students (Shao-Ting Wei (魏少亭), Yu-Rou He (何羽柔), Ya-Ting Wang (王雅婷), Zi-Bin Wang(王子彬)) those who in the elite classroom said. They put water and calcium sulfate into the egg shells in order to make the environment chalk. This invent is as good as the traditional chalk which are made by calcium carbonate. In the future, we want to change the composition of the chalk into flour or potato flour, which we could eat, and our health would not be injured. In addition to, it is good for the environment, the director said.


We can not deny that the chalk dust which is a big problem. As we can see the color of an egg shell is the same as normal chalk. Could it be possible to use the egg shell instead of the normal chalk’s material? Those students said. “We can take advantage of the egg that the egg shell chalk’s powder is heavier than normal chalk’s powder”. Student Yu-Rou He said. “We can grind five gram’s powder with an egg. And the key point is the powder which may influence the quality of the chalk. Therefore, the powder of the chalk is related to quality of writing. The Students said.


The researchers not only have to change the color of the chalk but also have to concern about the environment’s problems. For that reason, they decided to find the color which is from foods. For instance, the resource of green chalk is come from spinach juice, red chalk is made of tomato juice and yellow chalk is extracted from ginger etc. “For this research, we spent almost half years to stay in the market even more to stay in the lab.” The students who made this experiment said. However, they think the hardier thing in this research is to peel the membrane which in the egg than find the egg’s shell. That because, if you do not peel the egg’s membrane as clean as you can, the chalk is easily to smell stinking when you made it.


The resource from:  Reporter Jia- Wen Gan / China times /Tao Yuan 2009-04-24 07:26



http://n.yam.com/chinatimes/healthy/200904/20090424463294.html


 


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