This method held a pre-eminent position in glassforming ever since its introduction in the middle of the 1st century BC until the late 19th century .
This method is still widely used nowadays as a glassforming technique , especially for artistic purposes .
This method held a pre-eminent position in glassforming ever since its introduction in the middle of the 1st century BC until the late 19th century , and is still widely used nowadays as a glassforming technique , especially for artistic purposes .