This is one of the oldest processes known to man the first examples go back to Roman times. Items made in this way were already existed in the XVI century. Fallen out of use, the techni- que was picked up again in the mid-nineteenth century and attained its peak in our century, especially as a result of work by Artisti Barovier and Venini & C.
Making a murrina consist essentially in preparing a sheaf of multicolored glass rods, arranged so that its cross-section is according to a predetermined design. It is then heated and when the melting point is reached it is drawn out until the desired diameter is obtained. After cooling, the rod obtained in this way is cut up into small disks of variable thickness, ranging from just a few millimetres to a couple of centimetres, whose section has the previously made design.
They are now ready to be used in several ways. Their use in the production of several kinds of objects is done in two different ways: the first consists in preparing on a metal plate a set of murrine according to a given design, heating them up and then making them adhere by rotation on the sur- face of an item with a cylindrical shape, still connected to the blower’s pipe. After this the item is finished as usual, on occasion coating it with a layer of transparent colourless glass. All tht vases produced in the 40s and 50s by Artisti Barovier, by the F.lli Toso firm and by Venini & C. are made with this technique.