Object made of hollow glass

Details Object made of hollow glass Object made of hollow glass

C - Chemistry, Metallurgy

03

C

C03C 3/087 (2006.01) C03C 3/095 (2006.01) C03C 4/02 (2006.01) C03C 4/08 (2006.01)

Patent

CA 2727068

The invention relates to an object made of hollow glass and having, for a thickness of 5 mm, a global light transmission higher than or equal to 70%, said global light transmission being calculated by taking into account the illuminant C as defined by standard ISO/CIE 10526 and the colorimetric reference observer C. I. E. 1931 as defined by standard ISO/CIE 10527, and a filtration power higher than or equal to 65% and preferably 70%, said filtration power being defined as equal to a value of 100% minus the arithmetic average of transmission of 330 to 450 nm, wherein said object has a silico-sodo-calcic chemical composition that comprises the following optical absorbing agents in a concentration that varies within the following weight limits: Fe2O3 (total iron) 0.01 to 0.15% TiO2 0.5 to 3% Sulphides (S2-) 0.0010 to 0.0050%.

L'invention se rapporte à un objet en verre creux présentant, pour une épaisseur de 5 mm, une transmission lumineuse globale supérieure ou égale à 70%, ladite transmission lumineuse globale étant calculée en prenant en considération l'illuminant C tel que défini par la norme ISO/CIE 10526 et l'observateur de référence colorimétrique C. I. E. 1931 tel que défini par la norme ISO/CIE 10527, et un pouvoir filtrant supérieur ou égal à 65%, notamment 70%, ledit pouvoir filtrant étant défini comme étant égal à la valeur de 100% diminuée de la moyenne arithmétique de la transmission entre 330 et 450 nm, ledit objet ayant une composition chimique de type silico-sodo-calcique qui comprend les agents absorbants optiques suivants dans une teneur variant dans les limites pondérales ci-après définies : Fe2O3; (fer total) 0,01 à 0,15%; TiO2 0,5 à 3%; Sulfures (S2-) 0,0010 à 0,0050%;

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