The Vault Tiles – 123 x 72 x 9 mm – for the fundamental restoration of the eastern tube were manufactured as porcelain stoneware using the dry pressing method. Scratch-resistant, chemically resistant feldspar glaze, applied layer thickness approx. 0.8 mm. A transparent glaze was applied to a beige-white engobe.

The Wall Tiles – 150 x 150 x 11 mm – for the fundamental restoration of the eastern tube were manufactured as porcelain stoneware using the dry pressing method. Scratch-resistant, chemically resistant feldspar glaze, glaze thickness approx. 1 mm. The engobe is colored gray-blue. Seven color shades were created, with production per color shade in one batch.

The Baseboard Tiles – 150 x 150 x 11 mm – for the fundamental restoration of the eastern tube were manufactured as porcelain stoneware using the dry pressing method. These are fully colored porphyry tiles. Scratch-resistant, chemically resistant feldspar glaze, glaze thickness approx. 1 mm, produced in a single batch.