White ink for natural structures are intended to produce the ink whiteboard that is made from natural plant using the chemical, because white pen is a device key used in teaching and learning and the Whiteboard pens are sold in the local market but has the smell stinky chemicals and harmful to the body when you inhale a must. If the Whiteboard pen can do, and more so from the chemical structure for the ink whiteboard ideas from nature and improve the quality of aroma and color, including white, natural ink for miles and more secure. We can also manufacture ink Whiteboard from a natural plant extract with alcohol with 3 types of hibiscus plant was brought to the red ink from vegetable balls plang, magenta, green and leaves Grandpa her ratio of ink is alcohol 100 ml 100 g: plants to ink with Aqua.Makhem concentrate made by step 2 plants 50 grams 100 grams into step 1 take each of the plants, 50 g piece quantity to beaker, then put the alcohol into 100 ml quantities left 24 o'clock, and then filter by chua, white fabric, vegetable and thin the remaining 50 g of each type to compounds that filter on each of the other types of leave for 24 hours, then filter and the smell of cooked on a different volume ratio per ink white perfume is 1:3 and 3:3, 3: c.From the experimental results, there is no ink residue sludge from the Hibiscus has dark red can be written, and there is a smell. That meets the purpose of the experiment and you can make up yourself, which is useful for teaching.
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