When you say "14 mesh" or "20 mesh' what does that mean in relationship to a typical window screen for instance ? A standard kitchen sifter is what size mesh ? Is there a very fine mesh available that will sift flour finer than a standard kitchen sifter ?
The 14 or 20 mesh size is just how many openings there are per inch of mesh. You can search our site for "flour sifters" to find the differen size mesh that are available.