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2010-08-08 09:43:43
Dye can bring a little color to life. Most clothing is colored with dyes. Modernmanufature , manufactured dyes can be costly. Natural dyes from plant and animal product 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 vite vat method, for example, can be used to dye wool with onionskins. For this example, use 100 grams of natural wool. The wool must be cleaned, lived 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 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.
| 听写于：2010-8-8 9:42 | 用时：30:41 | |
| 正确率：91% (+20.5分) | 错词：18个 |
