Bowl

Hemispherical glass bowl, with a convex and decorated wall, circular base and flat bottom, slightly flared mouth and rounded lip. The original fragment is preserved, in a translucent honeyed monochrome color, which has led to the reconstruction of the complete piece made of opaque methacrylate.

It would be a so-called "ribbed" bowl due to its decoration of ribs (of which this piece preserves three) that start near the base and end below the mouth. These ribs, with pronounced relief, are arranged in a gallon decoration, they are distributed radially equidistant around the wall of the bowl and increase in thickness from the base towards the mouth of the bowl. Inside you can see the double concentric grooves derived from the mold part manufacturing process.

Ribbed glass bowls imitate metal models and are very characteristic types of the 1st century AD, being manufactured at first in mosaic glass (various colors) and later in monochrome glass. This rib decoration is obtained directly when a mold is used to make the piece, either manufactured with the pressing-modeling technique or by mold blowing.

The piece exhibited here can be classified as Isings type 3, form 68 Morín-Jean. Due to the type of profile of the container and the shape of its ribs, it can be classified as Isings 3a.

Rib length has been considered a chronological indicator; In this sense, those specimens that carry their nerves from near the mouth to the bottom are frequent in the time of Claudius-Nero and continue until the Flavios, then beginning a decline that gives rise to the fact that in the 2nd century AD. The testimonies of this bowl are very scarce. In the Ebro Valley the production of molded glass began in the first half of the 1st century AD, the most common type being the rib bowl.