Abstract
.Science project. The ink from rust. Therefore, this world has potential development in many areas. And education is another important. In the study of knowledge information is written to save memory.It will use the pen and ink for use in writing, the experimenters have seen the importance at this point. Since the present ink sold as such high price, and chemicals, so we think การทำน้ำ ink made from nature.Give good performance when writing, is being that no pungent odor, and can use the canisters by experiment 1 lead, stainless steel 1030 50 g and tea leaves 10 grams soaked in hot water 200 cc.For 1 hours. To compare the efficiency and ink solution using criteria of infection resistant to paper, ink density. The experiment 2 brought plants and plant products for tannin. Experiment, including tea leaf,The bark of the tree stumps, fresh หมากแห้ง piece, were cut into small pieces and one sperm 20 g rasp steel, or stainless steel, each 50 grams. Put into a beaker, 250 CC size. Calcium carbonate by wearing down. Pour the boiling water, the 200 cc.Soak it 1 hours
.It is found that the experimental results 1 reaction between stainless steel and tea leaf the black ink solution from samples indicated that the experiment 1 without calcium carbonate color ink dark but catch กับกระดาษ slightly. And the experimental results 2.With the interaction between the stainless steel tea leaves and plants, astringent, including tea leaf,The bark of the tree stumps, fresh หมากแห้ง piece, cut into small pieces, from the examples showed that the experiment 2 put calcium carbonate ink catch paper but make color of ink fade a little
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