I s a type of processing that derives directly from the processing of the cast sheets. A maschara (trap) is placed on the bronzino , almost like a punch, of the desired shape and the glass is poured into it with a case.

The glass, liquid, stretches and takes exactly the shape of the sagoma. From this principle endless variations are born, because you can also make other secondary masks that, placed inside the main mask, allow you to work with different colors and with different shapes.