Materialien
Gypsum plaster; colourless glass (some with a greenish tint); coloured glass (green, blue, two shades of orange, yellow, two shades of red flashed glass), wood, metal
Technik
The stucco lattice of this window is probably a cast of the latticework of window IG_364. As with the original, coloured pieces of glass were placed on the back of the openings in the stucco lattice and embedded in a thin (2–3mm) layer of stucco. In contrast to IG_364, there are no signs that the pieces of glass were fixed onto the lattice with an adhesive before embedding. To improve the adhesion of the thin layer of stucco on the latticework, the back of the stucco panel was roughened with a serrated tool. The stucco panel is c.42mm thick and held in a wooden frame of the same thickness. The front and back of the window were finished with a serrated tool.
With exception of the orange-coloured glass, which is very thick (6–7mm), the coloured glass is 2–3mm thick. The colourless glass is slightly thinner (1.5–2.5mm).
The orange pieces of glass show elongated bubbles as well as striations on the glass surface. The texture is similar to that observed on 19th- and 20th-century mouth-blown antique glass. The blue glass shows many round and elongated bubbles, which also suggest that the glass was mouth-blown. The pieces of glass were cut roughly according to the design of the latticework using a glass-cutter. Scratch marks along the edges of several pieces of glass bear witness to this process.
Erhaltungszustand und Restaurierungen
The front of the window shows continuous, diagonal cracks and losses in the latticework. On the back, there are two larger defects in the stucco panel as well as losses in the thin stucco layer. The pieces of glass are missing in these areas. The window shows no signs of previous restorations.