<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区
          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: 精品在免费线中文字幕久久| 人妻中文字幕精品系列| 欧美色资源| 91九色国产成人久久精品| 99久久亚洲综合精品成人| 亚洲精品日韩久久精品| 午夜精品福利亚洲国产| 在线免费成人亚洲av| 九九热视频在线免费观看| 久久99国产精品久久99软件| 国产乱久久亚洲国产精品| 国产性生大片免费观看性| 日韩精品一区二区三区视频| 国产成人高清精品亚洲| 亚洲va无码专区国产乱码| 国产久免费热视频在线观看| 精品国产一区二区三区2021| 久久综合国产精品一区二区| 日韩有码中文字幕国产| 亚洲午夜久久久影院伊人| 无码专区一va亚洲v专区在线| 久久精品一区二区东京热| 午夜男女爽爽影院免费视频下载| 99国产亚洲精品美女久久久久| 亚洲精品毛片一区二区| 亚洲 卡通 欧美 制服 中文| 在线播放国产精品一品道| 亚洲免费观看一区二区三区| 精品视频一区二区三区不卡| 亚洲av成人一区二区三区| 国产精品一二三区视在线| 中文日产幕无线码一区中文| 99在线精品视频观看免费| 国产精品久久久久孕妇| 疯狂做受xxxx高潮欧美日本| 久热这里只精品99国产6-99RE视…| 国产三级最新在线观看不卡| 巨胸美乳无码人妻视频漫画| 你懂的视频在线一区二区| 中文有无人妻vs无码人妻激烈| 久久一日本道色综合久久|