The use of color in the aspects such as the dye used food coloring. Use สีสกรี fabric, coated objects such as cement mixed with food. These colors are usually synthesized from chemical reaction.Often the high costs. The expensive and might be harmful chemicals to human beings. Synthesis of color from the chemical reaction. The need to use chemicals in large quantities and to provide sufficient consumption demand of human beings.The production of shirts, producing things. Using colors to add to the beauty, but has lost behind us. From this problem, education is the concept to extract the color of nature. To reduce the use of chemicals.Such as pea flower okra, mangosteen, etc.!The study found that A lilac color extraction from the screen cloth. From the project work extracted color ink screen printing fabric of pea flowers (สุทัตตา Chai nutritional 2553: La3) choose to extract the color of pea flowers because plants color blue is their. The blue is a popular color used to screen the pea plants and creepers easily grown in Thailand. The technology has Indicator properties, lilacBased on the change of pH Which can make the cloth screen has a variety of colors. But the ink will not too hot. The leached with water easily, and also the moldy easily.The study found that, even with the use of Roselle, which has the red and red shell color is quite intense. There is a red clear and Roselle plant easily and easy to grow. Do not use chemicals in the removal of insect pests.Can grow well in soils of all kinds. Because of this therefore choose Okra in extraction of color printing and tested several features 5 suitable for making screen printing ink. Method of screen printing on cotton, Snell
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