The NBS smoke density test using a smoke box or NBS Smoke Chamber has long been the most widely used laboratory-scale method for measuring the smoke generated by burning materials.
The specific optical density of the resulting smoke is determined photometrically.
Samples are usually tested for 10 minutes, (or longer if the maximum optical density has yet to be reached.)
Data from the NBS Smoke Chamber (or smoke box) is usually presented graphically as cumulative optical density versus time curves.
Maximum corrected specific optical density values are quoted either as Dmc, or as Dmc/g in which the values are normalised for sample mass consumed during the test.
The NBS Smoke Box conforms to the following Standards:
Sample dimensions: 76mm x 76mm x up to 10mm thick.
ITRI Innovation’s smoke density testing service is extremely experienced at providing smoke density test results, with a fast turnaround, at very competitive rates using an NBS Smoke Chamber (smoke box).
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