Glass substrate with interference colouration for a facing panel

A glass substrate, comprising a glass sheet and a stack of coatings covering a face of the glass sheet, wherein the stack of coatings comprises in succession from the glass sheet:

• a first transparent coating comprising a dielectric material with an optical thickness of 5.0 nm or more and 258.0 nm or less,
• a semi-transparent functional coating with a geometric thickness of 0.1 nm or more and 50.0 nm or less,
• a second transparent coating comprising a dielectric material with an optical thickness of 20.0 nm or more and 300.0 nm or less, and
• an opacifying coating, comprising a metal, metalloid, nitride, carbide, or any combination thereof, capable of providing opacity or quasi-opacity of the stack,
• wherein a geometric thickness of the opacifying coating is 50.0 nm or more, and
• the glass substrate has interference coloration and is suitable for a facing panel,
• wherein the first and second transparent coatings comprise at least one layer having a material selected from the group consisting of silicon oxides, mixed oxides of at least silicon and aluminum, silicon nitrides, aluminum nitrides, mixed nitrides of aluminum and silicon, silicon oxynitride, aluminum oxynitride, and mixed oxynitrides of silicon and aluminum,
• wherein the semi-transparent functional coating comprises at least one layer having a metal selected from the group consisting of titanium, tungsten, niobium, chromium, nickel, copper, tantalum, zirconium, yttrium, palladium, iron, and alloys or mixtures of at least two of these metals and stainless steels, and
• wherein the stack of coatings provides a visible light transmittance of at most 4%, when said stack is applied to a clear silica soda lime float glass 4 mm thick, measured with a source corresponding to the CIE standard D65 “daylight” illuminant and at a solid angle of 2°, according to standard EN410.