Hygrometer calibration/ Boveda pack question

[shibby4781]

Originally Posted by RonC

extremely accurate. just get most of the air out of the ziploc, and give it a 48 hour test

Hi All! I know this is an older thread but this sparked a question I have had for some time now. What is the best type of container to use and how much air should be in it. If I do it in a zip lock bag should I get most of the air out? Also what is the purpose to getting most of the air out? I usually use the salt test method but I do want to try these calibration kits. They seem to be pretty worth it to get the best accuracy.