The flamed finish of marble and natural stone gives the rock a rough, vitreous and very natural appearance.
The stone acquires a rough aspect in which soft mounds and depressions alternate and curl the surface providing an elegant anti-slippery treatment.
Obtaining the flamed finish
The process involves a modification of the surface properties applying directly a flame. When the stone is being exposed to high temperatures, its outer layer explodes and becomes rough and wavy.
For this purpose, oxy-propane torches inclined at 45° are used, they reach between 2500 °C and 2800 °C and are capable of causing numerous splinters to detach from the surface.
The rough and vitreous texture that the material adopts thanks to this treatment makes it a perfect candidate for outdoor coatings. The rock acquires non-slip properties and is very resistant to atmospheric conditions.
Which natural stones allow the flamed finish?.
It is normally used on igneous rocks such as granite and, occasionally, on some limestone stones which, due to their composition, are extremely hard.