LIME STONE POWDER
Leading Manufacturer of kaolin powder, white limestone powder and fine limestone powder.
Leading Manufacturer and Exporter of Limestone Powder such as Lime Powder and Industrial Salt from Kolkata
LIMESTONE is calcareous sedimentary rock composed of the mineral calcite (CaCO3), which upon calcination yields lime (CaO) for commercial use. The main source of limestone is the limy ooze formed in the ocean. Limestone can easily be dissolved by acids. The rock containing more than 95% of calcium carbonate is termed high-calcium limestone. Recrystallized limestone takes good polish and is used as decorative and building stone. It is then called ‘marble’.
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This is a fine grade of 325 mesh the correct fineness for cold casting. Limestone or other stone powders are added to polyester resin, polyurethane resin, epoxy, gypsum cement or other binders. Small objects are cast and cured in suitable molds. To conserve metal when casting large pieces you can dust (salt) the mold surface, brush a thin coating on the surface, spread or roll the powder on or spray a thin coating. The mold is then back filled with resin or fiberglass, iron or steel shot, sand or calcium carbonate to increase the weight to give it the heft and feel of a hot foundry ‘pour.’
You can also lighten the piece by added hollow glass beads to your back up casting mix. After curing and removal from the mold the object must be gently abraded or burnished with fine steel wool (triple 0 grade), a Scotch Brite® pad, or sand blasted to remove the microscopic film of binder from the surface of the stone particles. This exposes the pure stone beneath. Click here to download information of creating cold casting pieces. The object will have the authentic look and feel of a true stone carving. That is because the surface is now true stone.
- PRINTING INK
Specifications of Limestone Powder:
- Chemical Name : Calcium Carbonate
- Molecular Weight :100.086 g/mol
- Molecular Formula : CaCO3
- CAS Number: 471-34-1
- EC Number: 207-439-9
- PubChem CID: 0112
- State: Solid
- Appearance/Color: White Powder
- pH Value: 9.4
- Purity: 97% Min