(Test standard withdrawn by ASTM, January 2016)
This ASTM test method measures the torque developed when type 1A child-resistant closures are rotated counter-clockwise. Type 1A closures are reclosable continuous threaded containers that use a random push down while turning: no orientation of the push down force is necessary
A calibrated torque meter capable of indicating clockwise and counter-clockwise torque. The meter should have a means of securely holding the container without distortion.
Separate, unused containers and closures are sampled in accordance with established statistical sampling procedures. If required, they may be conditioned in a controlled temperature and humidity environment as detailed in this ASTM standard.
Please refer to the latest official ASTM test method D 3472-97 (2002) for more detailed information. This overview is intended to provide a basic understanding of the test procedure and suitable equipment to meet the standard.
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Using the Tornado to test to ASTM D3472-97
Testing type 1A Child-Resistant closures
ASTM D3472-97 Reverse-Ratchet torque