Description
Diamond point engraving on blown objects was adopted in 1549 in Murano, fifteen years after it was used on mirrors. In the Roman period, similar but rougher engravings were probably carried out with a stone pointed tool.
Traditionally, thin and soft engraving is carried out with an industrial diamond-pointed pen. The engravings are linear, at times with a resulting chiaroscuro effect. The stippling engravings (Dutch: Stippelen) from the 18th century in the Netherlands with a graphic effect, were particularly refined.
Today, drills with diamond rotating discs are widely used which, though, leave a less thin mark.