I've recently gone through a stretch of unstable lumber from various different sources. All the lumber reacted the same way when cut. Right before finishing the cut with the blade the lumber would POP releasing tension and cupping the wood instantly. I thought it would be a good learning opportunity to see what was going on.

My research indicated case hardening or tension set. I thought it was interesting so I made this video. If you have more to share on the topic, have a correction to something I said, or simply want to tell me that the Detroit Lions will never win a Super Bowl then feel free to leave a comment. Have a good day.

Test for case hardening in lumber: https://www.popularwoodworking.com/wo...

Post I was reading in the video: https://www.woodweb.com/knowledge_bas...

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