The Lime - The Venetian Polished Plaster Process
Lime is an ancient, eco-friendly, renewable and highly resistant material. It originates from pebbles rich in calcium carbonate which are transformed into slaked lime in a journey through
tradition and technology.
Just as in ancient times, wood is still the fuel used for baking the pebbles in the kiln. Not a single tree is cut down. Large amounts of scraps from local carpentries are collected and turned
into sawdust. The sawdust is blown into the oven and burns without using gas, petroleum, coal or electricity.
Tradition and innovation combine in the baking stage. An automatic control system oversees every step of the process, in a continuous cycle lasting for about a week. The temperature is kept stable
by metering the addition of sawdust and highly sophisticated filtering systems dampen the emissions into the atmosphere
The pebbles, crumbled by backing, become quicklime. Immerged in water, they are dissolved in a dense liquid, grassello or slaked lime, which is filtered before being poured into the maturation
tanks. Unbaked portions, “calcinaroli”, that would otherwise jeopardize the product quality, are here discarded.
In the tanks, almost like a good wine, the slaked lime rests for at least six months. This is the minimum time for the material to turn into the chemical structure of matured slaked lime.
The slaked lime
It has been a long journey, but it is just the beginning. The slaked lime is now chemically balanced, pasty and of utmost quality. Before it enters the manufacturing process, it is micro-filtered
once again, to remove the smallest impurities and make it creamy. Venetian Polished Plaster has been created.