Which method is commonly used for achieving proper mixing of powders?

Trituration is a method commonly used for achieving proper mixing of powders due to its effective mechanical mixing technique. This process involves grinding the powders together using a mortar and pestle or similar equipment, which helps to break down the particles and create a homogenous mixture. The repeated grinding not only mixes the powders but also allows for the uniform distribution of any active ingredients, which is essential in pharmaceutical preparations to ensure accuracy and consistency in dosing.

While filtration is primarily used for separating solids from liquids, levigation is a process used to reduce particle size and create a smoother texture by mixing a solid with a liquid that does not dissolve it. Condensation, on the other hand, refers to the process where vapor becomes liquid, which is unrelated to powder mixing. Thus, trituration stands out as the most effective method for ensuring that powders are properly mixed for pharmaceutical applications.