What is fusion?

• A. Components are combined together, melted, and cooled with constant stirring until uniformity
• B. Components are mixed until uniformity
• C. Liquids are mixed at room temperature without heating
• D. Solid powders are ground with a solvent

Answer: (A)

Fusion is a method of preparing a homogeneous mixture by heating all solid and semi-solid ingredients until they melt, then combining them into one liquid, and finally cooling the mixture with constant stirring to maintain uniformity. This approach ensures that components, especially waxes and fatty substances, are evenly distributed as they merge into a single mass. It’s distinct from simple stirring at room temperature or using solvents, which don’t require melting and may not yield a truly uniform product.