CHAPTER 4
RESULTS
4.1. The effect of guava leaf extract tannin to ink whiteboard nature
of the study. Tannin extract from the leaves of guava is turquoise. Suitable for a whiteboard with pen. Because ink extracted smells fresher than with pen whiteboard commonly sold in the market 4.2. Adoption of the efficacy of the extract tannins found. Can be deployed by a variety of approaches have been used mainly. In this experiment is to make ink from nature. Because the extraction of tannins are sweet, harmless to health and smells better than the smell of chemicals from ink cartridge that is not made by nature. The cost of production is relatively less than the chemicals used in the manufacture of ink today. And can be deployed, such as water treatment, treatment of the meat to rot. Dyes due to the color of the extract tannins that have a dark color can be used to dye fabrics.
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