ISO 1806 test standard “Fishing nets: Determination of mesh breaking force of netting” provides a recognised method for the industry to objectively test the tensile strength of nets.  

Understanding the mechanical properties of the mesh and knotted structures of fishing nets is fundamental for net manufacturers when designing products, which must withstand the heaviest of weather conditions and the degenerative effects of heavy pollutants and extremes of temperature – all factors which affect the strength and service life of fishing nets. Measures to optimise the performance and longevity of the netting may include coatings for anti-fouling and rope preservation. The effects of these treatments on the mechanical strength of the product must be evaluated.

Once in service after a certain period in the sea it is important for users of fishing nets, such as fish farmers, to evaluate the loss of resistance within the net and to know how far the mesh can elongate. This helps determine whether nets can continue to be used or require imminent replacement.