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QS white oak end grain spotted appearance12/22
I am wondering if any body knows what causes spotted end grain appearance in QS white oak. Could that be related to the tannins or mineral deposits. Other then the ends grain appearance wood looks good besides minor honey combing in a few spots.
I have seen this many times in 8/4 White Oak. But, I have no idea what causes it. It doesn't show up on the other faces, so it has not been a problem.
It does look look just a bit of water splashed on the end, but it is more than that.
Not much help, eh?
Pretty sure it is a normal characteristic of the color variations in the White oak .Often the color is on the dark side of White for sure in general . Mineral streaks that occur seem to show on the end grain as well .
I saw and dry Oregon white oak and other Pacific Northwest hardwoods. The color variation that you see in the end grain seems to be caused during the drying process. This variation is common and in my experience appears more frequently in wood that is dried from green in the kiln than wood that is air dried to 12% or so before going to the kiln. I have not experienced any differences in the strength or working characteristics, just a slight color difference. It is not considered a defect unless color consistency is critical.
White oak contains high levels of tannic acid in the heartwood, which prevents the fungi that cause spalting from growing, so the wood is definitely not spalted.
The honeycombing that you note is from the wood drying too quickly during the early stages of drying. White oak is much more difficult to dry than most domestic hardwoods and a common error is to dry too aggressively when the wood is above 20% moisture content. Cool starting temperatures and slow dry rates above 20% with lots of patience are the keys to success.