Architectural Quality

Sphinx Glass is produced by means of the float process, which gives the glass its perfect flat and parallel surface. The product comes with advanced optical properties, exceptional clarity and light, transmittance, thanks to Egypt’s high quality silica sands.

The production process itself entails pouring molten glass over a bath of molten tin; the glass then flows over the surface, forming a smooth floating ribbon, with even thickness on either side of the tin. The ribbon then passes through a cooling tunnel known as the annealing (LEHR.). In this controlled setting, the temperature is gradually lowered to remove any internal stresses in the glass sheet and allow for its workability during processing.

At Sphinx Glass, special attention is paid to annealing process to ensure optimum post processing results in the tempering, double glazing, lamination, coasting and silvering stages. High dimensional accuracy is applied during the online cutting process to ensure the glass sheets come out as perfect rectangle.

Glass Configuration UV Visible Light Solar Energy
Sphinx Clear Monolithic % % % % %
(MM) Transmittance Transmittance Reflectance Outdoors Reflectance Indoors Color Render Index Ra (D65) Transmittance Reflectance Absorption Solar Factor
EN410		 SHGC SC U Value W/M2K
4 62 90 9 9 99 84 9 7 0.86 0.85 0.99 5.8
5 59 89 9 9 98 82 9 9 0.85 0.84 0.98 5.8
6 55 89 9 9 98 80 9 11 0.84 0.83 0.97 5.8
8 51 88 9 9 97 77 8 15 0.82 0.81 0.94 5.7
10 49 87 9 9 97 75 8 17 0.80 0.79 0.92 5.6
12 46 86 9 9 96 72 8 20 0.78 0.77 0.90 5.5
15 42 84 8 8 95 68 7 25 0.76 0.75 0.87 5.4
19 39 84 8 8 95 65 7 28 0.73 0.72 0.84 5.3

– Performance data is based on representative samples of factory production. Actual values may vary slightly due to variations in the production process.

– Tabulated data is based on NRFC methodology using the LBL Windows 5.2 Software and where noted European methodology using WinDat WIS version 3.0.1 software.

– SF = Solar Factor (EN410) also known as g-value

– Color Rendering Index Ra (D65) = the ability transmitted daylight to portray a variety of colors compared to those seen under day light without the glazing.

– “a(D65)” refers to an average of eight color samples at 6500 K color temperature. In illumination, general color rendering indicies Ra above 90 are very good and Ra between 80 and 90 are good.

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