Opacity O quantifies the degree of optical coverage obstructing the passage of light from a surface on which a sheet of paper, the weaker the show-through effect of the background.
Principle
The reflectance factors of a paper specimen placed on a black support Ro and on a stack of a model paper of “infinite” thickness Roo are measured.
O = (Ro/Roo) x 100 %
How to use
Prepare four paper sample and put it on to the tester
Push print opacity
Push number for how many for point test
Push ENTER then ENTER
Push MEASURE point, do the same things with different space point
Released sample and put on black up
Put in sample per sheet and press point MEASURE, do the same things
Push ENTER, for averages test result
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