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NEXT, THEY TAKE A SAMPLE
FROM EVERY BATCH AND MEASURE THE pH LEVEL. IT SHOULD HAVE A READING OF 8.8,
QUITE HIGH BECAUSE OF THE CHALK. THIS IS WHAT'S CALLED
A SANDABILITY TEST. TECHNICIANS FIRST LET A PRECISE
AMOUNT OF COMPOUND HARDEN ON A PIECE OF DRYWALL. THIS MACHINE THEN SANDS IT DOWN, APPLYING 100 STROKES
IN 2 MINUTES
FROM EVERY BATCH AND MEASURE THE pH LEVEL. IT SHOULD HAVE A READING OF 8.8,
QUITE HIGH BECAUSE OF THE CHALK. THIS IS WHAT'S CALLED
A SANDABILITY TEST. TECHNICIANS FIRST LET A PRECISE
AMOUNT OF COMPOUND HARDEN ON A PIECE OF DRYWALL. THIS MACHINE THEN SANDS IT DOWN, APPLYING 100 STROKES
IN 2 MINUTES
Full Transcript
00:00:01.000 --> 00:00:04.271
NEXT, THEY TAKE A SAMPLE
FROM EVERY BATCH
00:00:04.273 --> 00:00:06.409
AND MEASURE THE pH LEVEL.
00:00:06.411 --> 00:00:10.217
IT SHOULD HAVE A READING OF 8.8,
QUITE HIGH BECAUSE OF THE CHALK.
00:00:12.289 --> 00:00:15.895
THIS IS WHAT'S CALLED
A SANDABILITY TEST.
00:00:15.897 --> 00:00:18.009
TECHNICIANS FIRST LET A PRECISE
AMOUNT OF COMPOUND HARDEN
00:00:18.902 --> 00:00:20.837
ON A PIECE OF DRYWALL.
00:00:20.839 --> 00:00:22.574
THIS MACHINE THEN SANDS IT DOWN,
00:00:22.576 --> 00:00:25.447
APPLYING 100 STROKES
IN 2 MINUTES.
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Movie Summary
Television series that documents how various everyday products are made.