NR BR 1829
Specification for Glass Sheet: Flashed Opal on Pot Blue for Signal Indicators
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| Organization: | NR |
| Publication Date: | 1 June 1982 |
| Status: | active |
| Page Count: | 5 |
scope:
The glass is required for use with internally illuminated panel indicators which are required to be normally obscure in the dark condition and to provide a reasonably sharp white image indication of good luminance when illuminated through a legend mask on the internal diffuse face from an incandescent lamp.
Document History
NR BR 1829
June 1, 1982
Specification for Glass Sheet: Flashed Opal on Pot Blue for Signal Indicators
The glass is required for use with internally illuminated panel indicators which are required to be normally obscure in the dark condition and to provide a reasonably sharp white image indication of...
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