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Mesh denotes particle size or granulation of powder. When guar gum powder is prepared, it is granulated through mesh screens during the sieving process.

+40 mesh means powder will pass through a sieve of 40 mesh.

-100 mesh means powder will not pass through a sieve of 100 mesh.

+40/-100 mesh guar gum powder means 90% of powder will pass through 40mesh but not through 100 mesh. Hence particle size lies between 40mesh and 100mesh.

Read wikipedia article on mesh.

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11y ago
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Q: What is meaning of mesh in guar gum?
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