Gneiss

Raw Split Surface

Features
Gneiss Calanca is an excellent material that, thanks to its stratification, is especially suitable for being split into relatively thin thickness (4-5 cm), obtaining slabs with natural split surfaces. After this process, its colour is dark grey.

The tolerance of the thickness, and therefore of its surface flatness, is about +/- 5 mm.

Use
Raw split Gneiss is particularly suitable for external use. In fact, the rough structure of its surface acts as a natural anti-slip (>R13)

Segata a diamante

Diamond-sawed side

Fiammata

Flamed side

Costa greggia regolata

Raw side

 
Alfredo Polti
Superficie lucida

Polished surface

Features
When polished, Gneiss Calanca obtains a very smooth surface as well as a "mirror" effect. With this process the material reacquires the dark grey colour, similar to the raw split.

Use
In particular for indoor floors, stairs and coverings (R9). Externally, it can be used for facade cladding, fountains, tables, sculptures, etc.

Costa lucida

Polished side

Costa levigata

Honed side

Segata a diamante

Diamond-sawed side

 
Alfredo Polti
Granigliata

Blasted Surface

Features
Shot blasting is a process of roughening the surface, which can be done in different finishes. The main purpose is to make the flooring adverse to slipping. Its colouring results, after processing, into a lighter grey compared to raw and polished.

Use
Blasted surfaces are suitable both for external use (anti-slip R13) and for interior work, which requires however a certain architectural style (ancient/rustic). Its structure is rough, but also of consistent thickness, making it particularly suitable for wet areas such as swimming pools, bathrooms, etc.

Segata a diamante

Diamond-sawed side

Costa greggia regolata

Raw side

Fiammata

Flamed side

 
Alfredo Polti
Superficie levigata

Honed Surface

Features
Honing removes any small defect or sign caused by sawing. It can be performed in different grain sizes. From coarse honing to smooth honing through medium honing (R12-R10). With this processing, the material reacquires its dark grey colour.

Use
Mainly for the interior such as floors, stairs, kitchen and bathroom coverings, tables, fountains and sculptures. Honed surfaces are also suitable for external facade cladding.

Costa levigata

Honed side

Costa greggia regolata

Raw side

Segata a diamante

Diamond-sawed side

 
Alfredo Polti
Superficie segata a diamante

Diamond-sawed Surface

Features 
When diamond-sawed, Gneiss Calanca has a smooth, even surface. As a result of this processing, its colouring is a lighter grey than, for example, raw and polished.

Use
The diamond-cut surface is suitable both for internal use and, limitedly, for external use (R12). For swimming pool coverings, sawing against the vein is preferred.

Fiammata

Flamed side

Costa greggia regolata

Raw side

Segata a diamante

Diamond-sawed side

 
Alfredo Polti
Superficie spazzolata

Brushed surface

Features
Similarly to blasting and honing, brushing can result in different gradations of finish, according to the customer's wishes: diamon-sawed and brushed = Satin; Sandblasted and brushed = Velvety; Blasted and brushed.

The result of this process is a surface which, although may appear irregular, is easy to care for, pleasant and smooth to the touch.

Use

Depending on the finish before brushing, this process is suitable for both indoor and outdoor use (R12-R10). For the particularities mentioned in the previous §, it is very suitbale for bathrooms, Floors and kitchen floors, pool edges, etc.

Costa levigata

Honed side

Costa lucida

Polished side

Costa greggia regolata

Raw side

Segata a diamante

Diamond-sawed side

Alfredo Polti

From nature to Swiss made

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