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- Dec 27, 2013
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ALSO I just remembered another question. HYPOTHETICALLY, could ironwood (like Arizona ironwood or something) absorb tung oil or some other oil, given enough time? I know everyone says ironwood "doesn't" absorb oils or finishes, but my thought is, what if I were to take the scales (only like 1/4in. thick) and let them soak in tung oil for like a week, or even longer, in an air-free container? Would they STILL absorb nothing?
It would absorb a little bit. The absorption is limited by two things. First is the pore size. The oil is drawn in via capillary action, the same force that pulls water up a paper towel if you dip the corner in. Ironwood has incredibly small pores, and that means it is very slow to absord oil.
The other limiting factor is that its already full of oil! Those tiny pores are already about saturated with natural oils known as heart wood extracts.
And lastly, it wouldn't do any good. The tung oil would just weep out of the handle and make a sticky mess.
Tung oil is a drying oil. That means that the long chains that make it up over time react and make the oil solid. But contrary to that name, it doesnt dry out, it cures. When tung oil reacts with oxygen it chemically changes to become solid. And in the already small, oil filled pores of desert ironwood or other exotics like cocobolo or kingwood there is not enough oxygen to cure and so the oil will just weep.