Glass, processed metals, leather, and plastics are examples of non-porous surfaces, which are further separated into rough and smooth surfaces. Glass and coated or varnished surfaces are examples of non-porous smooth surfaces. Textured surfaces like vinyl and leather are examples of non-porous rough surfaces.
Cardboard, paper, and untreated wood are examples of porous surfaces. The voids within a material’s surface define its porosity. Glass, polymers, and processed metals are made by melting the raw materials and then cooling them to create a smooth, cavity-free surface. Porosity has an impact on specific businesses; for example, for economic reasons, rock porosity is required when drilling an oil well. The surface porosity determines which approach is utilised to recover the fingerprint in latent fingerprint recovery. Because the print is on the surface and becomes deformed during travel, a non-porous surface is handled instantly.