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FINISHES

 

Finishing is a manufacturing process whose purpose is to obtain a surface with adequate characteristics for the particular application of the product being manufactured. This includes but is not limited to the cosmetic product. In some cases, the finishing process can have the additional purpose of getting the product to meet dimensional specifications.

We offer the opportunity to alter the surface appearance of all natural stones, depending on their application.

By applying different variants of the finishes described in this page, you can get differnt effects or patterns, applied mainly for decoration. A clear example is the combination of polished areas with clefted, sanded or scratched areas.

POLISHED

Polishing is achieved with almost zero porosity, emphasizing the highest levels of structure, color and texture. This "closed pore" finish, gives the stone more resistance to attack by external agents, a resistance that can be increased by various protective treatments.

This is mainly applied to marble and granite, and rocks that are very compact and have a high degree of crystallinity.

Polishing is achieved by abrasion through which different particle sizes become finer, giving the stone a brighter appearance. A diamond abrasive is mostly used today, which shortens time and gets dramatic results, while minimizing the labor force for people and machines.

FLAMEADO

This process consists of a high temperature treatment to granite surfaces. A flame at 45°-degree angle is applied to the surface of the stone, resulting in a relief surface that appears rough and glassy and rustic—without appreciable change in colour.

An increase in the resistance of the face to atmospheric chemical alteration is also achieved.

 

In other words, applying high temperatures to surfaces, using oxyacetylene burners over 2,500 º C, causes a thermal shock to the stone surface and the subsequent release of small slabs and splinters. This process is not "burned," but achieves a high degree of protection against atmospheric agents.

 

honed

Rubbing is achieved by a process similar to polishing abrasion, but without the resultant shine. Large production machines are also called polishing trains, and these are equipped with multiple heads that mount different abrasive grain per head and rotate on fixed benches along the process chain.

For small areas, this can be performed manually by means of articulated arm polishers. These achieve flat, smooth surfaces, dull and without any visible mark, provided the tone is darker than other terminal, highlighting the structure, texture and colours of the stone. This process is often applied to polished stones that do not reach the necessary degree of crystallization, often in the case of limestone and sandstone.

We could say that rubbing down is the first step to achieving brightness. This finish is applied in compact rock, with a minimum degree of hardness. As the polishing is achieved by abrasion, and in these cases it is most common to use conventional abrasives such as silicon carbide.

bushhammered

This is an ancient form of surface treating stone materials for exterior cladding and other handicrafts. The rock surface, previously formed, is struck repeatedly with a hammer (bujarda), carrying one or two heads of steel that contain small pyramidal carbide teeth (tungsten carbide).

The treated surface has small craters 1-3 mm in depth and width uniformly distributed, which add to the overall tone of the rock. It should be noted that these "bumps" on the size and density of the pointer are a factor of implementation, as is the force used and the number of impacts. In the case of very large bujardas the finish is quite rough, but usually these points are used to shape a surface.

Several types of bujardas, depending on the number and size of the tip, produce a fine or coarsely granulated surface. Another factor that determines the surface roughness is the strength and repetitions. Bushhammering is a more traditional finish because knocking is applied repeatedly with a tapping bujarda going to leave the surface with the desired texture.

SANDING

We consider sandblasting, a "mini bush hammered" method because in general terms, the characteristics of the two processes are very similar.

We blast the surface with silica sand or corundum, which is driven by air through a nozzle, thus "shooting" the sand against the stone. Depending on the pressure applied to the sand, the stone presents a punctuated and chromatic surface.

SAWING

Sawing is the process by which a block of stone is cut.

Sawing is almost always a must in any production line, and can be applied to marble, granite, limestone and sandstone. The sawing is done on looms, machines that use steel strapping, grit and water to transform a block stone in what is known as tables or machine equipped with diamond blades (cutters) for production of bands, tile or stone plate.

 

The strap sawing and grit leaves a more irregular surface, as the marks left on the stone after cutting are quite pronounced. Modern looms saw diamond bands on natural stone block.

The serrated edges leave a smooth surface that is very porous and rough to the touch, The stone has a dull, white tone and is usually scarred with the imprint of the tool.

In most modern looms marble yards, the strips are diamond segments that accelerate the process and also leave a more regular surface facing downstream processes such as polishing. In hard rocks are jagged with parallel marks that reveal the diameter of disc.

break

The finish break or Rachado (in Galician) is a finish that has the natural look of stone cut to open it manually with wedges, although nowadays this process is also done with hydraulic machinery that breaks the rock by the pressure of wedges aligned. The cutting is accomplished by the same procedure but in this case flaggy applies to non lajosas rocks. Typically these cuts are made by taking advantage of a plane of weakness such as rock mineral orientations in the case of granite. With all this you get a sharper relief, irregular and rough. The stone with this type of finish has been used for housing, to the preparation of paving stones or other parts for the building of walls.

ANTICATTO

Anticato finish is a finish system that is used on floors or maintaining them or to change their original appearance with a more modern and new.

The rough texture is achieved using abrasive brushes placed in some kind of conventional machinery to polish and shine surfaces (floor grinder or hand grinder).

LEATHER

The leather finish provides a flat and rough, which transmits a unique sensory perception to the touch for its beauty and finesse.

Its main feature is its matte finish, which makes Silestone in a smooth and pleasant, while maintaining full consistency of color. It is suitable for use in vertical tiling and countertops in both bathrooms and in kitchen.