What are fireworks and firecrackers made of?

This article is a handicraft with gunpowder as the main raw material.

The origin of fireworks can be traced back to the Han Dynasty in China. After thousands of years of development, its production technology and varieties are constantly enriched. Modern fireworks production needs to use potassium nitrate, sulfur, charcoal and so on. As the main raw material, it is mixed according to a certain formula, and ignited by a lead to cause an explosion, producing various colors, shapes and sounds for people to watch and entertain.