There is carbon dioxide in pop rock. When it comes to water, the sugar outside dissolves, and the carbon dioxide inside comes out, creating a feeling of "jumping".

When making pop rocks, high-pressure carbon dioxide gas should be added to hot syrup, which will form tiny high-pressure bubbles in sugar. When you put a piece of sugar in your mouth, you will hear a bang, which is actually the process of releasing carbon dioxide gas from each bubble. I feel jelly beans jumping in my mouth.

Lollipops are made of sugar, corn syrup, water and seasonings. Mix these things together, first melt the sugar, then boil all the water in the mixture, and then continue to heat up to make pure syrup, which becomes hard candy after cooling. Pop rock will hear the same cracking sound when he crushes sugar, and he will see bubbles in sugar under the lamp.

The development of pop rock;

1985, Kraft bought the manufacturing right of pop rocks and changed its name to Action Candy, 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 Jeong Woo Candy Company in 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 crystal pop rock was re-imported to the United States by UniConfis under the name of 1988.