Which type of mortar and pestle is recommended for mixing liquids and semi-solids?

The recommended type of mortar and pestle for mixing liquids and semi-solids is glass. This choice is primarily due to the non-porous nature of glass, which prevents any absorption of the materials being mixed and allows for easy cleanup. Additionally, glass mortars have a smooth surface that facilitates the mixing process, ensuring that liquids and semi-solids can be combined effectively without sticking or reacting with the material of the mortar.

Glass is also inert, meaning it does not chemically react with most substances, which is vital when working with various medications or compounds in a pharmacy setting. The transparency of glass allows the technician to easily observe the mixture, ensuring uniformity and consistency in the preparation.

Other materials, such as earthenware, porcelain, and Wedgewood, while useful for certain applications (like grinding solids), may not perform as effectively for liquids and semi-solids. For instance, they can have rougher surfaces that might trap materials or lead to unwanted chemical reactions, making them less desirable for this specific task.