Different Finishes of Natural Stones
Natural stone surface finishing is one of the major considerations on where the stone can be used appropriately. Different finishes will provide different slip resistance, chemical resistance and other external factors that can affect its functionality and durability.
Polished stone is created by using diamond abrasives up-to 3,500 grit followed by polishing powders. This finish is given to natural stone typically used for internal flooring. Polishing gives natural stone brightness and a mirror-like effect that intensifies stone colors and enhances the pattern. Polishing also reduces the porosity of the stone which increases the stones resistance to humidity and chemical substances.
Honed surface is achieved by the use of diamond abrasives as well, but unlike polished stone, honed stone has a smooth, non-reflective surface. Honed stone is more porous than polished stone and therefore it is not recommended for use on kitchen countertops in heavily used kitchens. Honed stone may be used in areas with less exposure to chemicals and for both internal and external areas. Honed stone should also be correctly sealed to assist against staining.
An antique finish gives stone an aged appearance by simulating use and wear. Acid wash is applied to surface of the stone to distress the surface of the stone. This generally dulls the colour of the stone. The surface then brushed with mechanical wire bush to make the stone smooth and slightly restore the colour.
A bush-hammered finished is created using a purpose-built high impact device to create an evenly textured surface. The texture creates a non-slip surface ideal for high traffic outdoor areas. This finish will lighten the colour and dulls any patterning found in a stone’s original state.
An exfoliated or flamed finish is one of the most used finishes for external area where slip resistance is a big consideration. The surface is produced by applying a high-temperature flame to the surface of the stone which creates thermal shock and causes the inherent crystals to fracture, resulting in deeply textured surface ideal for external surfaces. This finish is mainly used on granites, and will hide surface imperfections and tone variations.
A sandblasted finish creates a finely textured surface ideal for use in traffic-ways. Applying a high-pressure jet of small bullets, this treatment softens the colour and characteristics of the original stone.
As it states, natural cut is done manually by hand. This is the most rustic finish and is best used on feature cladding and cobblestones.
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