The ends are often plugged with clay (bentonite) or crimped paper to contain pressure, which creates the "bang" when it finally ruptures. The "Pyro Cracker" Variant
The "Pyro Cracker" is the smallest common size in the China-Böller family. China BГ¶ller Pyro Cracker
Originally used to drive away evil spirits (like the mythical monster Nian ), they became essential for celebrations like the Lunar New Year. The ends are often plugged with clay (bentonite)
The concept of the "China-Böller" (Chinese firecracker) traces back to the invention of gunpowder in China during the Song Dynasty (960–1279 AD). Early "natural" firecrackers were simply bamboo stalks ( baozhu ) that exploded when heated. A "China Böller" is a simple but effective
In the standard hierarchy, Pyro Crackers are smaller than "A-Böller," "B-Böller," "D-Böller," and the massive "Super-Böller".
A "China Böller" is a simple but effective pyrotechnic device:
In the late 20th century, these items were standardized for the European market. For instance, in Germany, "BAM" numbers (like BAM-PII-xxxx ) were used starting in the 1970s to certify their safety and performance. Technical Composition and Construction
