60 mesh screen size: 0.250mm；; Size of 30 mesh screen: 0.600 mm.

The larger the mesh number, the finer the particle size of the material; The smaller the mesh number, the larger the particle size of the material. Sieve particle size is the size of sieve holes through which particles can pass. The number of grids with an area of 1 square inch (25.4mm×25.4mm) is called mesh number.

The specifications of standard screens vary from country to country. The commonly used Taylor system takes the number of holes per inch as the number of sieve holes, which is called mesh number. For example, 100 mesh screen means 100 mesh per inch of screen.

Extended data

Screen mesh is the unit of measurement of particle size, which is usually used to determine the particle size distribution of granular materials. For example, a whole vehicle of peanut samples can be placed on a sieve with 5 mm holes. When you shake the screen, small pieces and dust will pass through the screen, and the whole peanuts will stay on the screen.

Commercially, peanut buyers can use this test to determine whether a batch of peanuts has too many pieces. This type of testing is very common in some industries. In order to unify the testing methods, several standard network series have been established.

The mesh number is the number of holes, which is the number of holes per square inch. The larger the mesh number, the smaller the aperture. Generally speaking, mesh number × pore diameter (micron number) = 15000. For example, the aperture of 400 mesh screen is about 38 microns; The pore size of 500 mesh screen is about 30 microns.

Because of the problem of open porosity, that is, because the thickness of silk used for netting is different, the standards in different countries are also different. There are three standards: American standard, British standard and Japanese standard, among which Britain and America are similar, while Japan is quite different. Our country uses American standards. The specific specifications of national standards are different, but the screening system is generally formulated in proportion.

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