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MARBLE TIPS

When the surface of marble is scratched and loses its original shine, the marble needs to be refinished and polished in order to restore the shine it had originally.
Restoring the shine simply means to smooth the surface until it shines.

Here are three different procedures needed in succession in order to restore the original shine.

1. Grinding

 Grinding is the process by which large scratches and lippages are sanded to make the surface even. The abrasives used have grit sizes 60 or less.
2. Honing Honing is same as grinding except diamond abrasives with grit size of 120 or above are used.
3. Shining

2 different methods:

(1) Polishing
A powdered abrasive is used. Powdered abrasives contain aluminum oxide or tin oxide and usually are white. Most powdered abrasives also contain a compound called oxalic acid which speeds the polishing process. Therefore, too much powder can burn the surface, so special care is needed for this process.
This procedure is most widely used.

(2) Recrystallization
This process consists of spraying a fluid onto the floor and buffing it in with steel wool under a standard buffing machine. The heat generated by buffing with steel wool reacts with the chemical producing a new compound on the surface.
This procedure is recommended when too much sunshine causes the uneven reflections on the surface.

*Please note that the grinding and honing are very time consuming and very messy processes because it requires lot of water for the lubrication. Some hard stones, like a granite, need an entire day just to grind 50 square feet.

Once the original shine is restored, a regular maintenance is required in order to preserve the original shine for long periods of time. For heavy traffic areas like a lobby in a Hotel, buffing every day using a steel wool pad with special chemical is all you need for keeping the original shine for several years.

If a regular maintenance is performed routinely, the grinding process can be eliminated when a refinishing service is needed resulting in cost savings.

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