The word mesh has a similar meaning as „net“ in English, but it is also a direct designation of a standard that came from the United States and which is defined by the number of meshes (eyelets) of a certain material per square inch. And the WHO, for example, is guided by this.
Mesh is a unit that indicates the number of eyelets (holes) in a certain material per square inch. For example, if we have 25 mesh, it means 25 holes per square inch, 150 mesh then 150 holes per square inch. It is clear that with 150 mesh the fiber will be denser and smaller particles will fall through it. After all, the sorting of various elements of different sizes is one of the most common uses for the materials defined by this unit.
If we magnified the material defined by the mesh unit under a microscope, it might look like a construction welded wire mesh. In short, a grid that consists of fibers placed perpendicular to each other and gaps (free space) between them.
For our purposes – that is, the outdoor area – the most important purpose defined by the mesh unit is to determine the number of holes on the mosquito net. This is where the WHO comes into play, defining the minimum standard for mosquito nets as 156 mesh. Some of the products we offer from companies such as Lesovik far exceed these standards with figures of around 1000 to 1500 mesh.
However, the material defined by the mesh may not be completely regular. In that case, something that could be described as a fraction comes into play, where the largest and smallest size of the mesh (hole) in the given material is defined. For example, 40/80 mesh or 40-80 mesh indicates that the material has a maximum mesh size of 40 mesh and a minimum of 80 mesh (holes per square inch). Fractions are used on a larger scale, for example, with gravel, sand and other loose materials.