Comparison between MIRO-SILVER®
and Multi-layer Polymeric Film (MPF)
Reflectivity-Over-Time Test
Comparison of sustained reflectivity after 150 hours UV-C Exposure
Sky Tunnel™ utilizes Alanod Miro Silver® when producing the Rigid98 used in its Rigid Tube Kits. You can see from the graphic, that whilst some other daylighting products using a Multi-layer Polymeric Film in their Rigid Tube have a higher initial Total Reflection, after just 40 hours of exposure to UV-C the reflection drops below that of the Miro Silver®.
Reflector Material under different angles
Advantage for MIRO-SILVER® (0-45°)
Same reflectivity for both products
Light Pipes such as Sky Tunnel™ which utilize MIRO – SILVER® will transmit much more light between 0 and 45 degrees when usable light is really needed.
Total-Reflection in % under an angle of
| 13.8° | 40° | |
| MIRO-SILVER® | 98.16 | 98.22 |
| Multi-layer Polymeric Film | 96.78 | 97.66 |
Tube 3 meter (10 ft) lenght x 300 mm (12 inch) diameter
| Angle 13.8° | output | MIRO-SILVER® advantage |
| MIRO-SILVER® | 0.48 | + 78% |
| Multi-layer Polymeric Film | 0.27 | 0% |
| Angle 40° | output | MIRO-SILVER® advantage |
| MIRO-SILVER® | 0.82 | + 6% |
| Multi-layer Polymeric Film | 0.77 | 0% |
Number of Reflections: |
||
| 13.8° | 40 Reflections | Advantage 78% |
| 40.0° | 11 Reflections | Advantage 6% |
Information provided by ALANOD Aluminium-Veredlung GmbH & Co. KG