Water purification project Whiteboard pen ink from Roselle, and stem bark. The objective is to produce the ink pen, whiteboard from Roselle, and stem bark.The trial procedure is as follows: Learn how to extract colors from red and hibiscus flower anchan and studying solvent can bring color and bite can be removed easily. Then try the flower and stem bark Roselle, 30, 40, 50 grams of alcohol with a bite of 30 quarter, 20, 10 grams, respectively, for a period of 2 weeks, and then apply the solution ink pen with white droplets come in synthetic fiber is cotton instead of bars. Use written on the White Board, using the criteria of measuring the intensity of color shades and cleaning, which found that the ratio of substances soluble ink flower per stem and bark, Roselle continued alcohol is alcohol, 40:20 with the intensity and cleaned most easily. Second is the ratio of 50:10 and: 30:30, respectively.
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