Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
Tinted soda-lime glass containing by weight the following glass forming oxides: ______________________________________
SiO.sub.2 60 to 75%
Na.sub.2 O 10 to 20%
CaO 0 to 16%
K.sub.2 O 0 to 10%
MgO 0 to 10%
Al.sub.2 O.sub.3 0 to 5%
BaO 0 to 2%
BaO + CaO + MgO 10 to 20%
K.sub.2 O + Na.sub.2 O
10 to 20%
______________________________________ wherein such glass also contains the following colouring agents (proportions by weight): ______________________________________
Fe.sub.2 O.sub.3
0.3 to 0.5%
Cr.sub.2 O.sub.3
0.0075 to 0.0230%
Se 0.0005 to 0.0019%
Co 0.0040 to 0.0070%
Ni 0.0050 to 0.0120%
______________________________________
Claim 2
Dependent Claim
96 words
Tinted soda-lime glass containing by weight the following glass forming oxides: ______________________________________
SiO.sub.2 60 to 75%
Na.sub.2 O 10 to 20%
CaO 0 to 16%
K.sub.2 O 0 to 10%
MgO 0 to 10%
Al.sub.2 O.sub.3 0 to 5%
BaO 0 to 2%
BaO + CaO + MgO 10 to 20%
K.sub.2 O + Na.sub.2 O
10 to 20%
______________________________________ wherein such glass also contains the following colouring agents (proportions by weight): ______________________________________
Fe.sub.2 O.sub.3
0.3 to 0.5%
Cr.sub.2 O.sub.3
0.0075 to 0.0230%
Se 0.0005 to 0.0019%
Co 0.0040 to 0.0070%
Ni 0.0050 to 0.0120%
______________________________________
Claim 3
Dependent Claim
20 words
A glass according to claim 1, wherein Cr 2 O 3 is present in an amount below 0.0195% by weight.
Claim 4
Dependent Claim
36 words
A glass according to claim 1 or 2, wherein said colouring agents are present in such relative proportions that the purity of colour of the glass is at most 6% when illuminated by CIE illuminant C.
Claim 5
Dependent Claim
44 words
A glass according to claim 1 or 2, wherein said colouring agents are present in the following porportions by weight: ______________________________________
Fe.sub.2 O.sub.3
0.35 to 0.45%
Cr.sub.2 O.sub.3
0.0150 to 0.0195%
Se 0.0010 to 0.00175%
Co 0.0050 to 0.0070%
Ni 0.0075 to 0.0100%
______________________________________
Claim 6
Dependent Claim
41 words
A glass according to claim 1 or 2, wherein said colouring agents are incorporated in such relative amounts as to impart to the glass a dominant wavelength in the range 500 nm to 570 nm when illuminated by CIE illuminant C.
Claim 7
Dependent Claim
39 words
A glass according to claim 5, wherein said colouring agents are incorporated in such relative amounts as to impart to the glass a dominant wavelength in the range 500 nm to 540 nm when illuminated by CIE illuminant C.
Claim 8
Dependent Claim
48 words
A glass according to claim 5, wherein said colouring agents are incorporated in such relative amounts as to give a position for the glass on the CIE colour diagram (illuminant C) which lies within the smallest quadrilateral enclosing the points (0.3140; 0.3326), (0.3171; 0.3302), (0.3056; 0.3197), (0.3022; 0.3223).
Claim 9
Dependent Claim
48 words
A glass according to claim 7, wherein said colouring agents are incorporated in such relative amounts as to give a position for the glass on the CIE colour diagram (illuminant C) which lies within the smallest quadrilateral enclosing the points (0.3072; 0.3250), (0.3083; 0.3234), (0.3053; 0.3212), (0.3044 0.3226).
Claim 10
Dependent Claim
20 words
A glass according to claim 1 or 2, wherein the glass has a factor of luminance between 45% and 60%.
Claim 11
Dependent Claim
15 words
A glass according to claim 1 or 2, wherein the glass is a float glass.