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Engineered stone

Materials > Engineered stone

Engineered stone („quartz“) was developed by Italian company Breton in 60ies of the 20th century.

Engineered stone contains circa 94% natural materials (crushed quartz, sometimes less granite); the rest is formed
by polyester resin, additives and pigments.

The trademarks Technistone (Czech product) and Silestone (Spanish product) do not differ much; they are manufactured
on the same technology. A slight advantage of Silestone is antibacterial protection Microban and in the meantime also special colours resembling marble (so called „veins“ technology, on which Technistone is working now, too), the disadvantage is higher price.

Main physical parameters

Bulk density

2.4 g/cm³

Hardness

6-7 according to Mohs  

Flexural strength

50-70 MPa

Abrasiveness

about 6 mm

Volume absorption

0.02 %

Heat resistance

140°C guaranteed, 180°C reached by kitchen tests

Chemical resistance

product will be damaged by long-term action of KOH (200g/l), H2SO4 (70%), KMnO4 (10g/l), HF (10%), for standard kitchen service quite irrelevant

Ecological parameters

meets the 51 NSF/ANSI Standard for contact of the material with foodstuffs, thanks to completely closed surface it does not support bacteria growth


Advantages and disadvantages by usage as surface material

Advantages:

  • High hardness and almost zero absorption

  • Practical 100% colour consistency

  • Quite sufficient chemical resistance

  • Resistance to microorganisms


Disadvantages:

  • Average heat resistance

  • Visible joints on longer products necessary (longer than 3m)



 
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