日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

您現在的位置: > Language Tips > Audio & Video > Special Speed News  
 





 
Bringing color to life with natural dyes
[ 2007-05-21 10:16 ]

Dye can bring a little color to life. Most clothing is colored with dyes. Modern, manufactured dyes can be costly. Natural dyes from plant and animal products have been used since ancient times. So this week, we describe a natural way to dye wool.

The advice comes from information written by Jenny Dean of the Intermediate Technology Development Group in Britain. This anti-poverty group is now called Practical Action.

There are several methods to put dye onto material. The vat method, for example, can be used to dye wool with onionskins. For this example, use one hundred grams of natural wool. The wool must be clean. Leave it overnight in water and liquid soap. Then wash it with clean water that is a little warm. Gently squeeze out the extra water.

A solution called a mordant is used in the dying process. A mordant helps fix the dye to the material. Traditionally, mordants were found in nature. Wood ash is one example. But chemical mordants such as alum are popular today. Alum is sold in many stores. It is often mixed with cream of tartar, a fine powder commonly used in cooking.

Mix eight grams of alum with seven grams of cream of tartar in a small amount of hot water. Add the solution to a metal pan of cool water. Next, add the wool and place the mixture over heat. Slowly bring the liquid to eighty-two degrees Celsius. Heat the mixture for forty-five minutes. After it cools, remove the wool and wash it.

To prepare the dye solution, cover thirty grams of onionskins with water. Use only the dry, brown outer skins. Boil the liquid until the onionskins lose their color, about forty-five minutes,. Remove the skins after the dye cools.

Now it is time to dye the wool. Place the wool into the dye and heat the mixture. Bring it to a boil, then immediately reduce the heat to eighty-two degrees. Now heat the dye for about forty-five minutes or until the wool is the desired color. Keep in mind that wet wool looks darker than it is.

Once the dye cools, remove the wool and wash it. Now the wool is orange or yellow. Or at least it should be.

Internet users can get the full details at practicalaction, one word, dot org. Again, the address is practicalaction dot org. And enter the word "dye," d-y-e, in the search box.

And that's the VOA Special English Development Report, written by Jill Moss. I'm Steve Ember.


點擊進入更多VOA慢速

(來源:VOA  英語點津姍姍編輯)

 
 
相關文章 Related Stories
 
Va. Tech: 'As strong a place as it has always been' The formula for becoming a pharmacist
Choose your degree at an American college
         
 
 
 
 
 
         

 

 

 
 

48小時內最熱門

     

本頻道最新推薦

     
  Bush backs immigration reform
  《云中漫步》(精講之三)
  Job market strong for college graduates
  Wolfowitz resigns amid conflict of interest scandal
  Britain's next PM promises different kind of gov.

論壇熱貼

     
  快快加入“凈臉兩周年特別活動”
  英語點津開博客,大家覺得怎么樣?
  立此存照(4):上海市政府網站
  "一夜之間出名"
  電視主持人說的"下面更多精彩”
  “關鍵時刻掉鏈子“怎么說阿






主站蜘蛛池模板: www.久久久久久久 | 欧美在线视频一区 | 五月天综合视频 | 成人午夜视频在线 | 欧美日韩视频在线 | 久久99精品久久久久久国产越南 | 国产视频在线观看一区二区 | 国产精品九九九九 | 欧美日韩中文视频 | 天天艹天天射 | 成人欧美一区二区三区白人 | 国产真实乱在线更新 | 日韩欧美自拍偷拍 | 亚洲v在线| 夜夜狠狠擅视频 | 国产黄色片免费观看 | 亚洲精品高清在线观看 | 自拍偷在线精品自拍偷无码专区 | 黄色免费看网站 | 在线国产一区二区 | 日韩女优网站 | 亚洲精品在线观看免费 | 黄色影院在线观看 | 亚洲成人免费在线观看 | 一级片网| 激情综合网激情 | 夜夜欢视频 | 亚洲第一男人天堂 | 大地资源第二页在线观看高清版 | 97综合网| 欧美色偷偷 | 欧美国产激情 | 国产精品美女www | 国产精品图片 | www.亚洲一区 | 中文在线字幕免费观看 | 免费av网址在线观看 | 超碰人人草 | 黄色片网络 | 欧美黄色大片免费看 | 免费一区二区视频 |