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Post by jerrysawitz on Jul 22, 2016 18:20:13 GMT -6
I read the Childers article on etching and was a bit dismayed when he said he can etch in vinegar in 24 hours. It takes me about three weeks to get the same results. anyone have advice? I don't want to use stronger acid and I've used several different base glazes with good amounts of copper.
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Kuba
Full Member
SztukKilka in Old Formu
Posts: 111
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Post by Kuba on Jul 25, 2016 15:19:58 GMT -6
Hi Jerry  Just use strong HCL! It is great for lungs!.....  And to be honest, I never used vinegar so cannot help about it. |
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Post by jerrysawitz on Jul 25, 2016 21:04:48 GMT -6
thanks Kuba, what concentration?
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Kuba
Full Member
SztukKilka in Old Formu
Posts: 111
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Post by Kuba on Jul 28, 2016 11:10:24 GMT -6
35-38% strong... it is evaporating like crazy so You need to use professional mask. I am using this one (it is made for car spraying paint purposes)  |
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Post by adammacmillan on Jul 28, 2016 13:50:07 GMT -6
Kuba - FYI, I don't think that filter is doing much for you. Do your filters say they are used for particulate or for organic vapors? Be careful with acid and base that strong. Great way to really get some nasty chemical burns. Also, acid vapors could potentially burn holes in the filter material depending on construction. I've seen some crazy things happen when a bottle of full strength acid gets knocked over in the lab and no one is ready to deal with it. This is the kind of respirator that everyone here should really be using for the kinds of thing we deal with, it will cover almost all your health needs. THe type is called a P100 for particulate (meaning it blocks 99.9% of particles over 200nm) and if you are using acids or organic vapors, it should block those too. www.coleparmer.com/Product/Filter_cartridge_Multigas_and_vapor_P100/EW-40113-75Alternative for the daring, only use them outside and practice holding your breath |
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Kuba
Full Member
SztukKilka in Old Formu
Posts: 111
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Post by Kuba on Jul 29, 2016 4:32:33 GMT -6
"practice holding your breath" Yes this is one way of doing things |
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Kuba
Full Member
SztukKilka in Old Formu
Posts: 111
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Post by Kuba on Jul 29, 2016 4:34:21 GMT -6
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Post by adammacmillan on Jul 29, 2016 10:51:29 GMT -6
Hi Kuba,
I dont believe it is. However, it may work fine for short durations and exposure. I would recommend contacting the manufacturer. Of course, those filters that are designed for it are made for people who work on an assembly line and are exposed to things like boiling HCL for long durations.
Personally, I use a half mask and goggles, and just try to operate in a well ventilated area.
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Kuba
Full Member
SztukKilka in Old Formu
Posts: 111
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Post by Kuba on Aug 6, 2016 9:53:39 GMT -6
I bought special filters for acids to my 3M mask My lungs are too precious for me |
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Post by Tracey Renner on Aug 6, 2016 13:06:01 GMT -6
Hi, Have you tried Sodium Bisulfate? I believe they sell it where you would buy pool chemicals... So far I have just done two tests and I have use white vinegar (which works); but I believe Sodium Bisulfate is much safer than HCl.
Ian Childler's writes "The two best ones I’ve used are plain old white vinegar in a bucket for 24 hours, or sodium bisulfate (otherwise known as PH Down for swimming pools) mixed with water in a bucket for four hours." "Both of these materials are generally safe to use and easy to get. They both work just the same at different rates of time. There are more aggressive acids out there, but I haven’t found any of them that worked any better than vinegar or sodium bisulfate."
And, "Submerge the pot in a bucket filled with 4 gallons of water and 2 pounds of sodium bisulfate. Let it sit for 4 hours"
"The Crystalline Journey" Pottery Making Illustrated July/Aug 2016
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Post by tileman2 on Aug 6, 2016 20:32:27 GMT -6
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Post by Tracey Renner on Aug 7, 2016 13:22:58 GMT -6
I see, that took me a moment. I was very surprised that acid etching has a different result than using an alkali.
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joerg
New Member
website: www.crystalsforever.com
Posts: 49
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Post by joerg on Aug 7, 2016 16:05:56 GMT -6
35-38% strong... I dilute HCL down to 10-20 % ... no evaporation, still does the job in some 1-4 h...you even can take the pieces out by hand, if you wash your hands , while washing the piece... with water within the next minute. |
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Post by jerrysawitz on Aug 10, 2016 18:16:18 GMT -6
Sodium bisulfate works much faster than vinegar.
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Post by ianchilders on Aug 25, 2016 9:00:11 GMT -6
Between Phil and Myself, We've tried all the acids available as i was doing research into what worked and what didn't several years ago.
At the end of it all i settled on Sodium Bisulfate mostly because of its availability, affordability and safety. There were Acids that worked more quickly (HCL), but i didnt want to deal with them. I work in a school environment and dont need HCL around my goofy students. Sodium Bisulfate gets the job done perfectly well for me for now. Vinegar was more of a starting point to see how a readily available natural acid would work. It did take more time, but for most people, its a comfortable starting point. Sodium Bisulfate was quicker and didnt stink the place up.
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Just use strong HCL! It is great for lungs!..... 
