Water purification project Whiteboard pen ink from Roselle, and mangosteen Peel. The objective is to produce the ink pen, whiteboard from Roselle, and mangosteen Peel.How do the experiment as follows: Learn how to extract colors from Roselle, and anchan and flower studies find a solvent that can bring color and bite can be removed easily. Then experiment by taking the mangosteen shell suit Roselle, 30, 40, 50 grams of alcohol, with 20/30 bites, 10 grams, respectively, for a period of 2 weeks, and then bring the substance soluble ink pen from Whiteboard drops by changing a synthetic bone cotton instead. Use written on the White Board based on the criteria of measuring the intensity of color shades and cleaning, which found that the substance soluble ink ratio of Roselle flower per stem bark and alcohol: alcohol is a 40: 20 with the intensity and cleaned most easily. Second is the ratio 50: 10 and 30: 30 respectively.
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