36 • Sample Presentation and Measurement Overview Datacolor 650/600/400 User's Guide
“Total” transmittance measurements are made with the white Spectralon® plaque in place.
“Diffuse” transmittance measurements are made by replacing the Spectralon® plaque at
the port with a light trap.
Total Transmittance
Diffuse Transmittance
Consult with your Applications Specialist regarding the measurement technique you should
use for specific evaluations.
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