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 Replies: 51 / Views: 6,939 |
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Bedrock of the Community
United States
12437 Posts |
For muriatic(hydrochloric) acid, you will need to wear personal protective equipment(PPE). Eye protection and gloves are mandatory, latex or nitrile works fine for short term exposure, and you will want to be in a well-ventilated area. I would not recommend working on a surface that needs to stay pristine so keep it off the granite counters in the kitchen  and you might also want to wear some old clothes, one tiny droplet will make a nice hole in a cotton shirt. Keep a box of baking soda nearby to neutralize accidental spills. What is the concentration you will be using? |
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Bedrock of the Community
United States
17884 Posts |
I would probably not play with muriatic acid. If yo do be VERY careful and I would do it is a well ventilated area, preferable outdoors and stay upwind from it. When you open the bottle it is concentrated enough that the acid will fume and you do NOT want to breath any of those fumes. They can cause severe damage to your mucus membranes and lung tissue. You will also find that unless you really dilute the acid it will probably work too fast to be practical. The tme between the resoration of the date and "destruction" of the coin will probably be short enough that you will have to stay right there with it trying to determine when it is "done" and then get it neutralized. TThat is the beauty of the vinegar method. Yes it takes longer to work, but you also have a very long and forgiving window of time for stopping the process.
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Pillar of the Community
United States
613 Posts |
Why would anyone even think about using that stuff, its dangerous.
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Valued Member
United States
335 Posts |
I put them side-by-side in the vinegar so that they don't overlap. I don't worry about them touching each other.
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Pillar of the Community
United States
2424 Posts |
the muriatic acid is formulated for pools pH. its not %100. I forget the percent active ingredient. I plan on diluting it tomorrow. and figure out a few good ratios. I might use some 37 or 36's I have sitting around just to test a few.
believe me I do not plan on PLAYING with any chemical. likc I said, I own a California DPR class B license to apply chemicals for a living that require testing and training. Muriatic acid does not even require a license of any kind to handle. but that shouldnt matter if you plan on using it. safety first.
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Bedrock of the Community
United States
19969 Posts |
Quote:
Why would anyone even think about using that stuff, its dangerous. With commonsense and proper safety precautions it's fine and it will work a helluv a lot faster than vinegar.  Biokemist offers sage advice. Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Bedrock of the Community
United States
12437 Posts |
Quote:
the muriatic acid is formulated for pools pH. its not %100 12M HCl(37%) is the highest practical concentration you will find, anything at the 40% level would be fuming HCl- truly nasty stuff. I would dilute it down to 5% and use that as your low starting point and incrementally move up from there based upon how comfortable you are with the speed of the etching. Anything over 20% would probably work too quickly and too harshly. Remember- always add acid to water, never add water to acid! |
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Pillar of the Community
United States
1450 Posts |
If you find a store specializing in canning supplies you can buy double strength vinegar. Safe to use but it works faster. That is all I use and I buy extra whenever I find it.
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Bedrock of the Community
United States
20753 Posts |
Quote:
Why would anyone even think about using that stuff, its dangerous.
It's basically called Monkey See, Monky Do. People seldom realize how many thousands or more people read things on the internet. Many are young and have little ideas of what is good and or bad. Many are not to well educated and when they see something on the internet, they think all is OK. The usage of Muriatic Acid, Acetone, Lighter fluids, or many other products mentioned on the internet become something that someone will try without proper supervision and possibly loose their vision. Only seldom are the many safety precautions repeated. This is why every time I see the mention of such items I recommend every one should first read as much as they can here or someplace on that subject. Using the Search tab is a start. Why would anyone even think of using that stuff. Because someone here said so and many out there will. |
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Pillar of the Community
United States
2424 Posts |
gee whiz.
i dont even want to get into this...
the muriatic acid I used today is 14.5%
i tried some diluted parts and nothing..
i then tried a straight solution, %14.5 and still nothing.. its been 1 hr...
i will try to hhave it go a while more, but I think its a dud
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Pillar of the Community
United States
2424 Posts |
well I had 4 buffs sit in 14.5% muriatic acid overnight, about 30 hrs or so, and I can see a bit more detail. going to have it go a few more days and see what happens.
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Valued Member
United States
335 Posts |
I think we'll stick with vinegar; it's safe, it's easy, it's cheap, it's fun, and it usually works.
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Pillar of the Community
United States
2424 Posts |
yea, I will forgo the muriatic acid.
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Pillar of the Community
United States
2424 Posts |
ok, i thought I might share some of the results from the muriatic soaking... i left this one in over the weekend. came out 1925-D its kinda hard to tell from the pics and the lighting. I thought it was 23, but it is 25.     |
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Pillar of the Community
 United States
564 Posts |
I would have to say your method is faster than the vinegar. I think you should leave it in for a bit longer. It might make the date pop better. Great results!
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Replies: 51 / Views: 6,939 |
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Posted 08/04/2010 6:48 pm
