Drop Packing Pressure and Time…?

This question came in from a molder overseas…

During process optimization, which is best, keep both the packing pressure and packing time to zero OR only holding pressure?
My Response
This is based on your machine. On most machines, you can turn the pressure down to zero and the pressure will turn off. Before you make this assumption, you should verify this by turning off the time and ensure the part looks the same.
Additional Thoughts
For some related reading, please review some of the following: 

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