What is an example of a semi-porous surface?

A semi-porous surface is one that has some degree of permeability, allowing certain substances to pass through while restricting others. Leather is considered semi-porous because it has a natural texture that allows for some absorption of moisture and air, yet it is not fully permeable, as more dense liquids and large particles may not easily penetrate. This characteristic makes leather suitable for various applications where breathability is needed, such as in clothing and upholstery, but not so much for absorbing excessive liquids.

In contrast, glazed ceramic and plastic are generally non-porous surfaces, meaning they do not allow any absorption, while raw wood is more porous than semi-porous materials, as it can absorb moisture and a wide range of substances more easily. This understanding of porosity is crucial when considering material properties in law enforcement contexts, such as evidence collection and handling.