Hard candy is made of white sugar, corn syrup, water and seasoning. Mix these things together, melt the sugar first, and then boil all the water in the mixture. Then continue to heat up, so that pure syrup can be made, and the syrup becomes hard candy after cooling. When making pop rocks, high-pressure carbon dioxide gas should be added to hot syrup. Carbon dioxide gas will form tiny high-pressure bubbles in sugar. When the pressure is released after the candy is cooled, the candy will break, but the fragments still contain high-pressure bubbles, which can be seen through a magnifying glass. When you put sugar in your mouth and the gas is released after the sugar melts, you will hear a "pop" sound. What you hear and feel is actually the process of releasing carbon dioxide gas from each bubble, which feels like fudge jumping in your mouth.
Pop rocks is an innovative candy, which appeared in the American market from 65438 to 0974. The inventor is Mitchell, a research and development scientist at General Foods. 1985, Kraft bought the manufacturing right of pop rocks and changed its name to ActionCandy, and produced pop rocks through a subsidiary called Carbonated Candy. In the same year, Kraft Foods sold the manufacturing equipment, technology and sales rights of pop rocks in Asia to JeongWooConfectionery in South Korea (now GF Co., Ltd. in Korea). Before GF Co., Ltd. made pop rocks, Kraft made Powdered pop rocks, and GF Co., Ltd. improved it into a crystal shape (and then matched it with lollipops with feet and other shapes), which made it more convenient to eat. This kind of crystal pop rock was re-imported to the United States by UniConfis Company in the name of CrazyDips on 1988.