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The walnut shell blasting is processed by degreasing, breaking, screening, etc. And it is granular, brownish as well as has many micro holes in the surface.Walnut shell blasting can be used not only as a filter material with good absorption effect, but also as a blasting media which will not destroy the surface of the workpiece, have good polishing effect and other advantages
link:https://www.renwa-abrasive.com/sandblasting-material/walnut-shell-blasting-media.html
Walnut Shell Blasting