What is the permeability of paper?

The permeability of paper refers to its ability to allow gases or liquids to pass through its structure. This property can vary significantly based on the type of paper, its thickness, and the manufacturing process. Generally, paper has a relatively low permeability compared to materials like membranes or fabrics, but specialized papers can be engineered for higher permeability for specific applications, such as filtration or packaging. Understanding paper permeability is crucial in fields like printing, packaging, and environmental science.