Bronze sculptures are renowned for their durability and intricate details, but many people are unaware that bronze itself is an alloy primarily composed of copper and tin. Beyond these two metals, several other raw materials play crucial roles in the production of bronze sculptures.

One of the most common additives is zinc, which enhances the alloy's fluidity and castability, making it easier to create fine details. Lead is sometimes included to improve machinability, though modern sculptors often avoid it due to toxicity concerns. Nickel or phosphorus may be added to increase strength and corrosion resistance.

For patination, artists use chemicals like ferric nitrate or cupric nitrate to achieve vibrant surface colors. Additionally, binders such as wax or resin are employed in the lost-wax casting process. Understanding these materials helps sculptors achieve the desired aesthetic and functional qualities in their bronze artworks.