Firstly, counting the number of openings per inch directly.
If it’s uncountable, how do you calculate mesh size?
For example, there are too many holes to count, or you think counting isn’t a good choice.
If the size of wire diameter and opening are known, then bring them into the formula to get the mesh size.
Mesh count = 25.4 mm / (wire diameter [mm] + opening [mm])
If both two are unknown, then how do you determine / specify your screen wire mesh size?
Firstly, using a micrometer to measure the wire diameter, and a ruler or vernier caliper to measure the aperture.
Secondly, using the formula to calculate.
However, if it’s uncountable and hard to measure hole size by ruler or vernier caliper, microscope may help you
