Any International Quality Standard?
American Society for Testing and Materials (ASTM) standards:
ASTM provides a series of standards for screen mesh size and testing methods, particularly in the fields of materials science and engineering.
American Screen Manufacturers Association (AMS) standard:
AMS provides manufacturing standards for screens and mesh sizes, including mesh size, shape, and material specifications.
European Standard (EN):
The European Committee for Standardization (CEN) has developed a series of European standards covering sieve size and testing methods.