Black Galaxy Granite: Know Your Granite

Black galaxy granite, as the name suggests, is a type of black granite. The appearance of metallic granulations or specks make it glitter on polishing. Just like the stars in the galaxy, hence the name. It is an extremely popular type of granite. It is preferred for flooring, counter tops, wall cladding among other uses. It is found in abundance in the city of Ongole, in Andhra Pradesh state of India. Incidentally Ongole is also the world’s largest exporter of black galaxy granite. The city is bustling with activity and a majority of the factories are spread across Ongole, and Chimakurthy nearby. The demand for black galaxy granite within India, and globally has been increasing year on year, and this has spurred the growth of the economy of the city. The number of factories processing the stone is ever increasing. The stone is robust and is commercially used for flooring and tiling. It has also found place in awesome table tops and vanity articles. Black galaxy mainly finds its application in commercial establishments and shops, or public spaces, mainly due to the glitter of the surface. In homes it may not be suitable for flooring, mainly due to the dark colour of the stone. It may give the room a dark appearance. The beauty of the stone stands out under bright lighting and hence you may have to modify the lighting of your room. Disclaimer: Mark Corporation does NOT deal with granite stones or tiles. Mark Corporation is a manufacturer of abrasives for grinding and polishing of a wide variety of granite, and other natural stone. The know your...

Polishing Granite Using Air Polishers

Though the title says polishing granite using air polishers, the method is applicable to all stones. Air polishers are those machines which run on a stream of air, which is used to rotate the polishing head. In a conventional electrical polishing machine, the motor spins the head at a specified/variable RPM. Air polishers offer many advantages over conventional machines.. They are lightweight as they do not have a motor and related circuitory, and boards inside the body. This is a very notable advantage, as during the polishing of any stone, the operator might have to use the machine over a long period of time. An air polisher reduces operator fatigue due to its weight advantage. Some operators also prefer the fact that an air polisher produces lesser vibrations than a conventional polishing machine. These vibrations are crucial as they might affect the quality of polish. No matter how steady one operates the machine, the vibrations produced by a conventional polishing machine might create fine surface undulations. This can be avoided by air polishers. On the flipside, to operate an air polisher, one needs an air compressor. If you are in a factory and have space for a compressor, this wouldn’t be much of a problem. However, if you are a contractor who has to use the polishing machine on site, then you will have to carry the air compressor with you. Portable compressors sometimes do not provide a constant pressure which is required by the machine. For Optimum performance it is recommended to use the machine at a minimum of 95PSI. Here is a video of an air polisher...

How to Polish Marble: Compilation

Marble is a soft natural stone. It is a form of limestone that has been transformed by pressure, heat and time. It is a very porous stone, and is notorious for its ability to become stained easily. However it has become a very important part of modern architecture. There have been many different guides on how to polish marble on the internet. We compile a list of them from around the wide wide web, highlighting the positives of each method. In this wikihow article on how to polish marble, the method detailed to get rid of stains using poultice, though time consuming, is very effective. The article also gives you a hack by using baking soda and water to polish the surface of the marble. The article also shares some very useful tips and precautions to avoid staining on marble surfaces. It is also possible to polish large expanses of marble flooring, or dull flooring can be restored using floor polishing pads. This article from countertopspeciality.com offers detailed insights into what is marble, what the different types of finished surfaces, and  how to restore marble, especially etch marks created by glasses containing liquids. They also have an e-book on offer which explains in detail DIY procedure of polishing marble. Also worth noting in their article is the fact that honed marble can not be restored. We would like to add that the only way to remove staining from honed granite is to grind the surface to the extent of stain penetration, and use a series of abrasive grits to achieve the honed finish again. However, depending on the depth...

Cat Eye: Know Your Granite Series

Cat eye granite is one of the most preferred choices for kitchen, flooring. This red brown granite is with a brown base and has large red grains or granulations, which seem to resemble a cat’s eye. Hence the name cat eye.  This granite is resistant to heat and weathering and can retain a polished surface for a very long period of time. Cat eye granite is also preferred in the making of granite tables and table tops. This is predominantly found in quarries in India. Maintenance and Upkeep of Cat Eye Granite Granite, by its very nature has very poor primary permeability. This means that dark stains, if not attended immediately, will damage your stone. Cat eye granite is no exception to that fact. However being a dark coloured stone, the stains are not very easily visible. However a few precautionary measures can reduce the possibility of stains damaging your cat eye granite. A good surface sealer will conceal all open pores on the surface. This will prevent the stains from getting below the surface of the stone A wax shiner, and re-sealing once in a couple of years, though not required, will enhance the longevity of the stone Any spills, or stains should be removed at the earliest If the cat eye granite is installed as flooring in high-traffic areas, a restoration and re-polishing job will be required based on the extent of use Disclaimer: Mark Corporation does NOT deal with granite stones or tiles. Mark Corporation is a manufacturer of abrasives for grinding and polishing of a wide variety of granite, and other natural stone. The know...

Kashmir White Granite: Know Your Granite Series

Kashmir white granite is a white based granite with brown and black dots. These dots or granules are present in every single piece of Kashmir white granite. The stone is sometimes also known as cashmere white. This granite is ideal for kitchen counter tops, backsplash areas, and is also a very popular ground paving stone. Predominantly this tone is preferred as a counter top material. The light colour of the stone will make your kitchens look elegant and brighter. This property of the stone make it preferred over darker stones for kitchen counter tops. This type of white granite is quarried in Tamil Nadu state of India.     Kashmir White granite counter tops are aesthetically appealing and are easy to maintain. The durability of granite can never be questioned. The counter top should last you decades with good maintenance. However, some precautions should be followed to avoid stains. Such maintenance is common to all types of natural stones because of the porous nature of the stone. More so, in the case of light coloured granites like the Kashmir white. Precautions to maintain Kashmir White Granite Any spillage should be cleaned immediately. Any dark spill, if allowed to sit for a while, will permeate the porous surface of the granite and cause staining. A sealer and wax shiner is recommended once in every couple of years, to maintain the sheen of the Kashmir white granite over a period of time. Disclaimer: Mark Corporation does NOT deal with granite stones or tiles. Mark Corporation is a manufacturer of abrasives for grinding and polishing of a wide variety of granite, and other...

Granite: Composition and Properties

Granite, has been in use over the decades, maybe even centuries. The is evidence of granite in use during pre-historic period as well as the popular modern era use in architecture and construction. Here we analyse what granite is, its composition, and physical properties, and examine the few different uses of granite. Granite is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. The word “granite” comes from the Latin granum, a grain, in reference to the coarse-grained structure of such a crystalline rock. The term granite also applies to a group of intrusive igneous rocks with similar textures and slight variations on composition and origin. These rocks mainly consist of feldspar, quartz, mica, and amphibole minerals, which form interlocking, somewhat equigranular matrix of feldspar and quartz with scattered darker biotite mica and amphibole (often hornblende) peppering the lighter color minerals. Granites can be predominantly white, pink, or gray in color, depending on their mineralogy. By definition, granite is an igneous rock with at least 20% quartz and up to 65% alkali feldspar by volume. Granite is nearly always massive (lacking any internal structures), hard and tough, and therefore it has gained widespread use throughout human history, and more recently as a construction stone. The average density of granite is between 2.65 and 2.75 g/cm3, Melting temperature of dry granite at ambient pressure is or 1215–1260 °C (2219–2300 °F); it is strongly reduced in the presence of water, down to 650 °C at a few kBar pressure. Granite has poor primary permeability, but strong secondary permeability. Composition of granite Here is the chemical...
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