Flachglas Aktiengesellschaft

Meindl Beratungs - Und Beteiligungs Gmbh

Hubert Drexler

Joachim Bretschneider

Ernst Winter

Friedrich Marwan

Hans Reiner Meindl

Gerald Burger

A neutral-colored soda-lime-silicate glass with high light transmission in the visible region. The glass has a basic composition which contains at least the following constituents: SiO,, 66-75 weight %; Na,O, 10-20 weight %; CaO, 5-15 weight %; MgO, 0-6 weight %; Al,O,, 0-5 weight %; and K,O, 0-5 weight %; and incorporates a colorant portion comprising the following constituents: Co, 0.1-1 ppm; Fe,O,, &lE;0.03 weight % (total iron content); and FeO/Fe,O,, >0.4. The glass possesses a light transmittance (illuminant D 65 according to DIN 67 507) of at least 89% at a reference thickness of 4 mm.

Soda-lime-silicate glass composition

A soda-lime glass containing vanadium which can be produced by the float process with high UV absorption for wavelengths below 350 nm. The glass comprises 70 to 74 weight % SiO.sub.2, 0 to 2 weight % Al.sub.2 O.sub.3, 0.1 weight % or less Fe.sub.2 O.sub.3, 0 to 0.15 weight % TiO.sub.2, 7.5 to 10 weight % CaO, 3.5 to 5.4 weight % MgO, 12 to 15 weight % Na.sub.2 O, 0 to 1 weight % K.sub.2 O, 0 to 0.02 weight % BaO, 0.1 to 0.3 weight % SO.sub.3, 3 to 7 weight ppm CoO and 0.1 to 0.3 weight % V.sub.2 O.sub.5.

Soda-lime glass containing vanadium

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Amberg, Germany

Hubert Drexler