Well, if you can find a place that does blueprints in your area, they
may have a source for "strong ammonia water". Note that this is NASTY
stuff to have anywhere near anyone, but does the trick nicely.
Right. NH3 is extremely hygroscopic (or is it hygrophilic?). Anyway,
it likes to bond with water, a LOT. But, it'll come back out given the
At some point a balance is reached, not sure which runs out of what
first, but yes.
It probably wouldn't get any darker. Assuming you use up tannin before
you use up ammonia, the strength just gives you speed vs. control.
I'm sure someone has studied it, but I can't google up anything on it.
try this - a couple of samples of oak from the same board. Gas fume
one, treat the other with a light wet coat of the ammonia solution (26%
"strong household ammonia" for my technique). The gas fumed oak has a
greyish brown colour, the wet-treated oak has a much darker near-black.
So the gas reaction may well proceed to an equilibrium and then stop,
but there's clearly a way to force it well beyond this, by applying an
aqueous solution. So whatever is limiting the reaction, I don't think
it's simply shortage of tannins.
this is a great thread.
I have little experiance in finishes, and never any thing beyond pine and
oak.(i guess white oak) soft wood.
i did not know about fuming.I had to google it.
now i feel i have another tool to use.
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