Ferric Nitrate on walnut?
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Wood Chop Shop (Working with wood)
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Ferric Nitrate on walnut?
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Topic: Ferric Nitrate on walnut? (Read 2810 times))
Greg_E
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Ferric Nitrate on walnut?
«
on:
April 06, 2021, 01:23:01 AM »
I've seen a few videos using ferric nitrate on curly maple and the results are really nice. I have a Kral made with Turkish walnut that is kind of crying for some kind of finish. Would I see benefit from the ferric nitrate (plus heat) or is the wood already too dark?
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TooJung2Die
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Re: Ferric Nitrate on walnut?
«
Reply #1 on:
April 06, 2021, 07:37:54 AM »
I have never stained walnut. It has the natural color many stains are trying to achieve. The finish, Tru-Oil, linseed etc, will darken the sanded walnut and continue darkening over time.
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sb327
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Re: Ferric Nitrate on walnut?
«
Reply #2 on:
April 06, 2021, 10:17:04 AM »
Aqua fortis will darken it some and if there is much burl, make it pop. Just neutralize really well afterwards then get after the linseed oil and it will age nicely.
Dave
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #3 on:
April 06, 2021, 04:50:42 PM »
I was going to try and buy a small "builders board" at one of the home stores, but they are charging almost as much as a replacement stock will cost for a couple board feet of boards.
I think I may give it a try and see what happens. I have an old muzzle loader with a maple stock I built from a kit some 30+ years ago, maybe I'll strip it down and refinish it, then get it rebuilt and functional, it was a fun "hand cannon" with real black powder belching huge clouds of smoke. Got it for Christmas one year from my parents, back in the better days.
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sb327
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Re: Ferric Nitrate on walnut?
«
Reply #4 on:
April 06, 2021, 06:39:55 PM »
It is the only wood stain/finish I care to use. Something about it.
I think track of the wolf still sells laurel mtn forge brand. It is good stuff. I have some I brewed up myself I like. It’s pretty easy to make but it is acid, so.......
I like using linseed oil too. The old saying on its application is once a day for a week, once a week for a month, once a month for a year and once a year forever. Lol.
Good luck.
Dave
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #5 on:
May 05, 2021, 11:15:31 PM »
I bought a bottle of crystals and gave it a whirl on some cheap red oak... When it goes on some parts turned almost black. Let it dry and still a bunch of almost black areas. Then cooked it with a heatgun and everything went brown. Threw a coat of truoil on it to see what it does, pretty nice considering I didn't sand it.
Think I'm still going to try this on the walnut. If I get a dark brown with black in the grain, it should look good. Almost like an ebonized look would be OK, but wholey black like ebonizing wouldn't be my first pick.
Ebonizing is iron in vinegar, often with tannin applied before the stain to make sure everything goes super dark.
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sb327
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Re: Ferric Nitrate on walnut?
«
Reply #6 on:
May 06, 2021, 03:22:45 AM »
Let us know how it turns out.
Dave
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #7 on:
May 06, 2021, 11:39:36 AM »
I guess if it fails, I can probably sand a little more and ebonize to black. I can probably know before I hit it with the first coat of truoil by wiping with some mineral spirits after cooking off the nitrate.
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45WLA
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Re: Ferric Nitrate on walnut?
«
Reply #8 on:
May 12, 2021, 02:32:19 PM »
Good luck.
I suggest that you get yourself some wood samples and make test panels. That's the best way to know for almost sure what you're going to get, and then try your favorite finish to get a look at the end results.
Depending on the piece of wood, I don't usually stain walnut and if I do, it's usually with a 'neutral' stain to simply highlight the grain. I remember a discussion of Ferric Nitrate in a finishing class I took, but have never used it. Lately, I've been finishing 'gun wood' with Minwax Wiping Poly. So far the results are good with little darkening and little yellowing. Very durable.
If you can't find your samples locally, try the web for wood working supplies.
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45WLA
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Re: Ferric Nitrate on walnut?
«
Reply #9 on:
May 14, 2021, 07:22:56 PM »
Update, I've gone through a couple of books [general woodworking and furniture finishing] and found nothing of value. There does seem to be a thread on the web among smokepole builders using ferric nitrate and some of the photos look interesting. You might look at Dixie Gunworks to see if they have any information available.
You have piqued my curiosity and I'll keep looking.
Good luck.
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Hawks Feather
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Re: Ferric Nitrate on walnut?
«
Reply #10 on:
May 14, 2021, 08:00:42 PM »
I have used Aqua Fortis on quite a few pieces of curly maple and like what it does, but never thought of using it on walnut. The thing with it, like sb327 said, is to make sure you neutralize it and I would also make sure to wear gloves.
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #11 on:
May 15, 2021, 11:32:25 PM »
Real aqua fortis is just nitric acid which still darkens the tannins in the wood.
The ferric nitrate (iron reacted in nitric acid) is a little nicer to handle, and in theory when you heat it to cause the color change, you are cooking off the nitric acid ion. Through it on a piece of steel and it rusts fast! I bought crystals and mixed with distilled water.
On this stock I'm thinking of a couple of options.
#1 if it is too dark, I can sand again and this should remove the iron from the more dense areas which might give a nice effect.
#2 if I don't like the result is I could treat with a tea solution to add more tannins and heat again. Might require another coat of ferric nitrate. This should give a black finish just like ebonizing (iron reacted with vinegar).
#3 would be if #1 fails and would probably be going through with #2.
A lot of this may depend on what I see after I raise the grain and sand, then wipe down with mineral spirits. If it looks really dark like this, I may skip the stain and go straight to truoil. The red oak I tried went completely black for a while, and almost milk chocolate brown in the tighter grain. It lightened up a little with a coat of oil. I didn't care too much about this oak, it is my beater stick to cut the sprue when casting ammo, just wanted to try out the technique.
I priced some bits of walnut "builder boards", and they are stupid expensive. Some options were as much as a replacement stock, so I just decided to jump in and see what happens. Worst thing should be I hate it and go to black with tea and nails in vinegar solutions. Hoping to do this work this week, but found the rear brakes on one of the cars are wiped out so need to tear them down and fix them. Still hoping I'll have time for sanding, staining, and some oil, along with some ammo casting and some time at the club shooting.
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45WLA
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Re: Ferric Nitrate on walnut?
«
Reply #12 on:
May 17, 2021, 04:44:08 PM »
Right now, most wood is stupid expensive. Luckily, I've got a Rockler store and a Woodcraft store within 10 miles, decent prices on 4/4 hardwood lumber 4~10 bucks per board foot for most of what we would want. You might want to be sitting down to price 8/4 though.
I looked in a Dixie catalog and found almost nothing except a mention in the listing of a tutorial DVD.
Good luck on your project and keep us posted.
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #13 on:
May 21, 2021, 08:43:35 PM »
Still not sure this was a good choice. Here is sanded to 400 grit and ready for stain.
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #14 on:
May 21, 2021, 08:44:20 PM »
Here it is with stain before heat.
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #15 on:
May 21, 2021, 08:45:35 PM »
Part way through the heating conversion, you can see the brown fade to yuck, the brown is the part that has been cooked
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #16 on:
May 21, 2021, 08:47:34 PM »
After dinner with one coat of truoil applied. When it is wet, it mostly looks great so I'll have to bring it to a polish before it is done. Thinking I might not mind ebonizing a stock some time.
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Greg_E
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Re: Ferric Nitrate on walnut?
«
Reply #17 on:
May 22, 2021, 08:57:28 PM »
Got about 5 coats on it know, starting to look a lot better. Definitely something I'm going to need to wet sand and polish to a gloss finish (if I can). I'll have to get better pictures tomorrow in the sunlight.
Very dark on one side due to the wood grain.
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sb327
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Re: Ferric Nitrate on walnut?
«
Reply #18 on:
May 22, 2021, 10:14:13 PM »
I think it looks good. Yeah, it looks yucky during heating but the yuck washes off when neutralizing.
I use linseed so I’m not familiar with how truoil acts when trying to achieve a gloss/shiny finish. With linseed, it’s all about patience. Put on several coats then a loooong drying time and buff to a shine.
Dave
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TooJung2Die
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Jon
Re: Ferric Nitrate on walnut?
«
Reply #19 on:
May 22, 2021, 11:28:31 PM »
Wear nitrile surgical gloves when applying the Tru-Oil. It'll smooth out to a high gloss and you'll never have a finger print. Google "Tru-Oil magic elixir". It's my favorite method for applying Tru-Oil. The best description is in the link to Rimfire Central by the person who discovered it years ago. You'll apply two to three times more coats in the same amount of time than using the normal method. This is my Blue Streak stock finished with Tru-Oil. No polishing needed, just the way it turned out using the method.
Jon
«
Last Edit: May 22, 2021, 11:31:52 PM by TooJung2Die
»
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All Springer/NP/PCP Air Gun Discussion General
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Ferric Nitrate on walnut?