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Test specimen shall be prepared
from the part of container where markings are not found. The optical
series principle diagram of iintergration ball type light
transmittance measurement device. The size of test specimen shall be
50mm X 50mm and the thickness shall be the original thickness of the
test specimen. The test specimen shall be prepared.
We install the white standard plate, adjust the reading (T1) of the
device's current meter to be 100z: adjust the amount of incident
light Under the status where the white standard plate is installed,
install and measure the test specimen to obtain the indication (T2)
of the current meter- The full light transmittance shall be
calculated according to the following formula.
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