Which type of soils cannot be dissolved in water?

In the context of soil types, insoluble soils are those that do not dissolve in water. These soils are typically made up of particles that are too large or too chemically stable to break apart and mix with water. For example, certain types of clay, silt, and sand can remain intact and maintain their structure when introduced to water, which is essential for many cleaning processes, including carpet cleaning. Understanding the nature of these soils is crucial for a carpet cleaning technician, as choosing the right cleaning agents is often dependent on the type of soils present in the carpets.

Liquid soils refer to substances that are in a liquid state and can be removed with water, while soluble soils can dissolve completely in water, making them easier to clean. Chemical soils are a broad category that may include both soluble and insoluble materials, yet they do not specifically indicate whether they dissolve in water. Thus, identifying insoluble soils is essential when addressing cleaning strategies, as these will require different approaches than those used for soluble soils.