Plywood QC Inspection Checklist : Part 40 moisture content.
Probably the most important factor in making a panel that will stay flat over a wide range of climate types is the core veneer moisture content. There are still many mills in China that use just air dried veneer in their plywood. There are also many mills in China that have a machine dryer but do not use it to its capabilities. While most mills know the correct moisture content for plywood (8-11%) – many do not have a moisture meter in their factory to check either the veneer dryness or the finished plywood moisture content. Our mills all use the same Wegner MM220 moisture meter that we use (a “pin-less” meter that I highly recommend). We worked with Wagner to calibrate it specifically for the hybrid poplar species used in the core veneer. (www.moisturemeters.com)