What is pumice stone?

Pumice stone a light porous acid volcanic rock having the composition of rhyolite, used for scouring and, in powdered form, as an abrasive and for polishing

Pumice stone has a number of characteristics that combine to make it a valuable and versatile player in a variety of industrial processes and products.

Pumice is amorphous and generally inert, has a neutral pH, yet is hard enough to be used as an abrasive. Yet, because of its porous nature, pumice is amazingly lightweight.

The friable nature of pumice is one of its most significant characteristics—meaning pumice is easily crushed and refined without loosing its utility: at any grade—from half-inch aggregate to microfine powder—pumice remains abrasive, absorbent, non-compacting, lightweight.

How to use pumice stone?

1. Industrial Abrasive Pumice
Pumice is widely used as an industrial abrasive where the protection of the surface is critical. Various grades and blended grades of pumice are used to: Polish glass, clean and texturize electronic circuit boards, clean lithographic plates, prepare metal surfaces for electroplating, buff leather and fine furniture woods, act as a tumbling media for things like buttons, cutlery, small metal or plastic parts.

2.Textile Softening

Known as stone-washing, pumice stones are tumbled with stiff fabrics or assembled garments (like denim) to soften the feel and age the appearance. Pumice stones are not only highly effective at giving fabric a natural worn-in look and feel, but pumice stones are long lasting and gentle on the expensive tumbling machinery. As for environmental friendliness…a natural pumice beats chemical and enzyme baths hands-down.

3.Pumice for water filtration
Pumice is a viable alternative to sand and anthracite as a filtration and clarification media for several reasons:1) Pumice has a low-density, multi-faceted, angular structure that traps and hold impurities; 2) is chemically inert, inorganic, long filtration media lifespan; 3) versatility allows for use in single or multi-media filters and in both pressure and rapid-gravity filter designs; 4) low-cost filter refurbishment; 5) lightweight.Crushed pumice results is a maze of multi-faceted, angular nooks and crannies that trap and hold impurities in liquids. Chemically inert and inorganic, pumice has a long lifespan as a filtration media.

4.Pumice  stone for horticultural applications
Pumice is renowned for its ability to condition soils and growing mediums by adding critical properties to the soil, such as enhanced drainage, and the ability to hold both water and air. Not only can plant roots easily access moisture and oxygen through pumice-enhanced soils, but the carbon dioxide respirated by the roots is able to easily escape the root zone.

What is available specification of pumice stone?

1. Solid granular: 1-3mm,3-5mm,5-10mm,10-30mm,30-50mm etc

2. In powder shape: From 60mesh to 325mesh.

Related products: Black and red lava stone.