Sudayu is a natural food preservative and fruit and vegetable cleaning agent obtained from Class A egg shells. Thanks to the ion exchange effect, bacteria and mold reduce the formation against yeast and slow down the reproductive rate. There are 30 products per 1 gram in a box. Sudayu was commercialized in Istanbul Teknokent A.Ş with grants from the 2011 Ministry of Science, Industry and Technology, Teknogirişim Capital Support and 2013 Tübitak 1507 Teydeb Project Support grants. the patent process and commercialization activities of Sudayu with a patented technology developed in Turkey is supported by İTÜNOV to TTO. Our product was awarded the "Best Academic Patent Award" by WIPO (World Intellectual Property Organization) in 2018. Usage Suggestion: In spraying method; 0.1% solution is prepared and sprayed on the product. For example, 1 g of water is added to 1 liter of water and the fruit is sprayed on the surface of the vegetable. In the immersion method; 0.1% of the amount of water used is added and the product is left to wait for an average of 10 minutes in the solution. For example, 1g of water is added for 1kg of water. Additional washing is recommended before and after application to vegetables and fruits. Added into the product; Depending on the amount of the product, 0,01% of water is dissolved in oil or water and mixed slowly. It is recommended to use the solution to be used (water with added water) within the same day. Sudayu is not completely dissolved in water, it can form precipitate. With the last washing, water is removed if it is applied to vegetables and fruits.