Utilization of Red Dragon Fruit Skin (Hylocereus Costaricensis) as an Indicator of Formalin and Borax in Food Acid-Base, Chemistry, Colour, Food, Health, Science Project|September 30, 2017September 30, 2017by Reyshan Preface 1.Problem The development of the times produces new ideas and innovations. This situation brings people to the bebagai advancement in the
