A Majolica Treated Cotto  
 

Cotto Trattato a Maiolica is a fully finished Impruneta clay tile that is absolutely impermeable.
This property is generated by the dry application of a ceramic engobe containing atomized clay powder, which, after kiln firing at 1000 °C, makes the cotto tiles trafficable immediately after laying.
Cotto Trattato a Maiolica tiles are guaranteed stain-resistant and require only very basic maintenance.