Industrial plants became ever larger in the 1950s. This led to the demand for more efficient filtration meshes. However, plain dutch weave mesh, which until that time was a proven solution, had reached its technological limits. A new generation of meshes was therefore needed, meshes that could guarantee a high and durable level of pore stability even across large filter areas. The GKD engineers found the solution in reversed dutch weave, a mesh structure combining a high number of thin warp wires and a small number of thick weft wires. This mesh, dubbed “Microdur“, offered the desired properties. This fine (“Micro”) and stable (“dur”) mesh still offers a long service life and durably safe and reliable filtration of both gases and liquids to this day.