A proposal has been made by a Working Group to withdraw UM 821 "A non-destructive production tool to measure the general flute quality and damage of corrugated board using resonance frequency technology."
The reason for withdrawal is that the method does not adequately describe the apparatus or mechanism by which the measurement is made, and it does not currently match any techniques or instruments available.
If you have any objections to this withdrawal, please send a message to standards@tappi.org no later than April 11, 2014.