ENAMELLED SUBSTRATE FORMING A PROJECTION SCREEN, AND PRODUCTION THEREOF

ENAMELLED SUBSTRATE FORMING A PROJECTION SCREEN, AND PRODUCTION THEREOF

The invention relates to an enamelled substrate for an (overhead) projection screen (and the production thereof), comprising a first glass sheet (1) including a diffusion layer (2), made from enamel, comprising a vitreous material having a thickness E1 of at least 5 μm and at most 20 μm, said vitreo...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: CHUDA, Katarzyna, BARLET, Marina, RUFINO, Benoit, CRAVERO, Louis
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS
CHEMISTRY
GLASS
JOINING GLASS TO GLASS OR OTHER MATERIALS
METALLURGY
MINERAL OR SLAG WOOL
SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS
SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:The invention relates to an enamelled substrate for an (overhead) projection screen (and the production thereof), comprising a first glass sheet (1) including a diffusion layer (2), made from enamel, comprising a vitreous material having a thickness E1 of at least 5 μm and at most 20 μm, said vitreous material comprising zinc and/or bismuth borosilicate. The matrix is porous and said diffusion elements have gas or vacuum pores (3) of characteristic size, in particular a diameter of at least 0.2 μm. The assembly comprising the first glass sheet and the diffusion layer has a light transmittance of at least 75%, a haze of at most 30% and at least 1%, and a gain of at least 0.4.