The projectiles used in paintball, designed to break upon impact, are typically composed of a thin, spherical gelatin shell filled with a non-toxic, water-soluble, and biodegradable mixture primarily consisting of polyethylene glycol, dyes, and other non-staining ingredients. The shell’s fragility is crucial for marking targets effectively, while the fill’s composition ensures safety and environmental friendliness.
The precise formulation of these spheres is critical to the sport’s playability and safety. A well-designed projectile will break consistently upon impact, leaving a visible mark without causing injury. Historically, the initial formulations were developed for marking livestock and trees, later evolving into the recreational product widely used today. The emphasis on biodegradability and non-toxicity reflects a commitment to minimizing environmental impact.