Fuming a Small Box With Household Ammonia #5: Penetration of the Fume Darkening Into the Wood

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Blog entry by Roger Kimmel posted 09-28-2014 01:57 AM 1299 reads 0 times favorited 1 comment Add to Favorites Watch
« Part 4: Fuming Through the Finish Part 5 of Fuming a Small Box With Household Ammonia series no next part

Since the ammonia fume diffused through the finishes so easily, I started to wonder how far it penetrated the wood. I had assumed the fume darkening would be a thing film, so I planed one of the edges to see how far it would go. I planed and planed, and found out that the fume had penetrated 1-2 mm through the face grain, and up to 10 mm on the end grain. You can see this in the planed edge shown above. The fumed finish on oak can easily stand up to extensive sanding. As always, please test this with your materials and techniques before you decide to try it on a real piece.

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#1 posted 09-28-2014 03:59 PM

wow, I never would have thought it went that deep. I guess if you scratch your furniture you don’t have to worry about fresh wood showing through, it will just blend in.

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