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#1
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acetic acid wherefrom?
Where can I buy some dilute acetic acid from?
I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] |
#2
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acetic acid wherefrom?
In article ,
george (dicegeorge) wrote: Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? Clear vinegar? Look for non brewed condiment on the bottle. Probably the cheapest one on sale in the supermarket. -- *One nice thing about egotists: they don't talk about other people. Dave Plowman London SW To e-mail, change noise into sound. |
#3
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acetic acid wherefrom?
"george (dicegeorge)" wrote in message
... Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] White vinegar is basically acetic acid and water. You can use it to neutralise the sodium hydroxide. Depending on its concentration, it can be quite agressive, so take suitable care. Do not use malt vinegar - it also contains acetic acid but will smell and stain. FWIW, the modern chemical name for acetic acid is ethanoic acid. |
#4
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acetic acid wherefrom?
"Steve" wrote in message
... "george (dicegeorge)" wrote in message ... Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] White vinegar is basically acetic acid and water. You can use it to neutralise the sodium hydroxide. Depending on its concentration, it can be quite agressive, so take suitable care. Do not use malt vinegar - it also contains acetic acid but will smell and stain. FWIW, the modern chemical name for acetic acid is ethanoic acid. I should have added that you can get it (white vinegar) from any any supermarket. |
#5
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acetic acid wherefrom?
george (dicegeorge) wrote:
Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Is it oil based paint you're removing? Alkali strippers won't touch emulsion. |
#6
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acetic acid wherefrom?
"Owain" wrote in message
... On 11 Sep, 16:27, "Steve" wrote: White vinegar is basically acetic acid and water. You can use it to neutralise the sodium hydroxide. Depending on its concentration, it can snip .. Would it be the "non brewed condiment" stuff? Owain No sure. I found an old bottle which says "The Original Cross & Blackwell Sarson's Vinegar Distilled Malt". The label also says 'traditionally brewed" so mine can't be the"non brewed" kind! I don't think it really matters though - if its the colourless, clear type (looks like water) it should be fine. It still smells vinegary though. I'd be tempted to test it (diluted to the concetration needed) on something that can be left outside to make sure the smell clears when the acid dries out. Good ventilation if used indoors would be important. If the OP reads this, he might want to bear it in mind. Steve |
#7
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acetic acid wherefrom?
george (dicegeorge) wrote:
Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Any acid will do. Citric acid (from winemakes suppliers) or even well diluted brick acid (hydrochloric acid) Malcolm |
#8
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acetic acid wherefrom?
Steve wrote:
"george (dicegeorge)" wrote in message ... Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] White vinegar is basically acetic acid and water. You can use it to neutralise the sodium hydroxide. Depending on its concentration, it can be quite agressive, so take suitable care. Do not use malt vinegar - it also contains acetic acid but will smell and stain. FWIW, the modern chemical name for acetic acid is ethanoic acid. Bloody hell. I'm not putting that on my chips.. Why did they change it then? And who said they could? :-) -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
#9
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acetic acid wherefrom?
Steve wrote:
"Owain" wrote in message ... On 11 Sep, 16:27, "Steve" wrote: White vinegar is basically acetic acid and water. You can use it to neutralise the sodium hydroxide. Depending on its concentration, it can snip . Would it be the "non brewed condiment" stuff? Owain No sure. I found an old bottle which says "The Original Cross & Blackwell Sarson's Vinegar Distilled Malt". The label also says 'traditionally brewed" so mine can't be the"non brewed" kind! I don't think it really matters though - if its the colourless, clear type (looks like water) it should be fine. It still smells vinegary though. I'd be tempted to test it (diluted to the concetration needed) on something that can be left outside to make sure the smell clears when the acid dries out. Good ventilation if used indoors would be important. If the OP reads this, he might want to bear it in mind. Steve The free stuff on the counter at the chippy is invariably non-brewed. I would think twice before getting caustic soda anywhere near plaster as it penetrates mercilessly and is then impossible to get rid of. Neutralising it with acetic gives you salts that are almost as troublesome as the original |
#10
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acetic acid wherefrom?
The Medway Handyman wrote:
Steve wrote: "george (dicegeorge)" wrote in message ... Where can I buy some dilute acetic acid from? Do not use malt vinegar - it also contains acetic acid but will smell and stain. FWIW, the modern chemical name for acetic acid is ethanoic acid. Bloody hell. I'm not putting that on my chips.. Why did they change it then? And who said they could? :-) pre 1970, IIRC. You should see what they call citric acid. |
#11
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acetic acid wherefrom?
On Fri, 11 Sep 2009 17:51:48 GMT, The Medway Handyman wrote:
Steve wrote: "george (dicegeorge)" wrote in message ... Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] White vinegar is basically acetic acid and water. You can use it to neutralise the sodium hydroxide. Depending on its concentration, it can be quite agressive, so take suitable care. Do not use malt vinegar - it also contains acetic acid but will smell and stain. FWIW, the modern chemical name for acetic acid is ethanoic acid. Bloody hell. I'm not putting that on my chips.. Why did they change it then? And who said they could? :-) Don't worry - it's well diluted with dihydrogen monoxide. -- Peter. The head of a pin will hold more angels if it's been flattened with an angel-grinder. |
#12
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acetic acid wherefrom?
Steve wrote:
No sure. I found an old bottle which says "The Original Cross & Blackwell Sarson's Vinegar Distilled Malt". The label also says 'traditionally brewed" so mine can't be the"non brewed" kind! I don't think it really matters though - if its the colourless, clear type (looks like water) it should be fine. If it's vinegar, it's brewed alcohol that's been oxidised (usually from beer if it's malt, or any kind of distilled alcohol if it's spirit). If it's non-brewed condiment it's food-grade industrial acid (probably from oil) that's been watered down. Either should be fine. It will smell vinegary by definition (the smell is the acid evaporating, so you can't avoid it). Theo |
#13
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acetic acid wherefrom?
Stuart Noble wrote: george (dicegeorge) wrote: Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Is it oil based paint you're removing? Alkali strippers won't touch emulsion. whoops i think its emulsion which someone smothered the moulding with.. so the peelaway might not work... [g] |
#14
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acetic acid wherefrom?
george (dicegeorge) wrote:
Stuart Noble wrote: george (dicegeorge) wrote: Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Is it oil based paint you're removing? Alkali strippers won't touch emulsion. whoops i think its emulsion which someone smothered the moulding with.. so the peelaway might not work... [g] It may break up the emulsion because of the prolonged soaking, but won't dissolve it. I'd test a (very) small area first |
#15
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acetic acid wherefrom?
On Sep 12, 1:25*am, "george (dicegeorge)"
wrote: Stuart Noble wrote: george (dicegeorge) wrote: Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Is it oil based paint you're removing? Alkali strippers won't touch emulsion. whoops i think its emulsion which someone smothered the moulding with.. so the peelaway might not work... [g] emulsion forms a very thin film, so is less troublesome re bulk. If there's bulk there and its not oil paint, its likely to be distemper. That's lime based and removes with acid. A good way to get acetic and other things most chemists dont stock is to look for a chemist's thats been there for decades and ask, explaining what you'll do with it. Reasonable chance they'll still have some things in stock from decades ago, and a person that would be happy to sell such things, once they know you know how to handle the stuff. NT |
#16
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acetic acid wherefrom?
PeterC wrote:
On Fri, 11 Sep 2009 17:51:48 GMT, The Medway Handyman wrote: Steve wrote: "george (dicegeorge)" wrote in message ... Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] White vinegar is basically acetic acid and water. You can use it to neutralise the sodium hydroxide. Depending on its concentration, it can be quite agressive, so take suitable care. Do not use malt vinegar - it also contains acetic acid but will smell and stain. FWIW, the modern chemical name for acetic acid is ethanoic acid. Bloody hell. I'm not putting that on my chips.. Why did they change it then? And who said they could? :-) Don't worry - it's well diluted with dihydrogen monoxide. Phew, thanks heavens for that. Hang on a minute! Isn't that lethal? -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
#17
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acetic acid wherefrom?
Stuart Noble wrote:
george (dicegeorge) wrote: Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Is it oil based paint you're removing? Alkali strippers won't touch emulsion. Nitromors shifts emulsion, use it all the time to get emulsion paint off copper pipes. -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
#18
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acetic acid wherefrom?
On Sat, 12 Sep 2009 07:51:56 GMT, The Medway Handyman wrote:
White vinegar is basically acetic acid and water. You can use it to neutralise the sodium hydroxide. Depending on its concentration, it can be quite agressive, so take suitable care. Do not use malt vinegar - it also contains acetic acid but will smell and stain. FWIW, the modern chemical name for acetic acid is ethanoic acid. Bloody hell. I'm not putting that on my chips.. Why did they change it then? And who said they could? :-) Don't worry - it's well diluted with dihydrogen monoxide. Phew, thanks heavens for that. Hang on a minute! Isn't that lethal? Well, the water companies are doing their best to eliminate it from the pipes before it reaches us, so there must be something wrong with it. If it were saleable they'd charge us for it. -- Peter. The head of a pin will hold more angels if it's been flattened with an angel-grinder. |
#19
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acetic acid wherefrom? - plaster peelaway
NT wrote: On Sep 12, 1:25 am, "george (dicegeorge)" wrote: Stuart Noble wrote: george (dicegeorge) wrote: Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Is it oil based paint you're removing? Alkali strippers won't touch emulsion. whoops i think its emulsion which someone smothered the moulding with.. so the peelaway might not work... [g] emulsion forms a very thin film, so is less troublesome re bulk. If there's bulk there and its not oil paint, its likely to be distemper. That's lime based and removes with acid. A good way to get acetic and other things most chemists dont stock is to look for a chemist's thats been there for decades and ask, explaining what you'll do with it. Reasonable chance they'll still have some things in stock from decades ago, and a person that would be happy to sell such things, once they know you know how to handle the stuff. NT White Vinegar is the acetic acid I need, thanks, I will try a big supermarket for it tomorrow, its used for trendy green organic cleaning, plus rubber gloves etc. But someone here said alkali strippers wont touch emulsion. There are thick layers of emulsion on the mouldings, it took me an hour to clear up a foot of it with plastic scraper water and toothbrush. Peelaway1 label says it will remove any combination of household paints and varnishes containing oil, lead, polyurethane or water so i'm hoping it will work. I will apply a thin layer on a test patch out of view, and then cover it with the gauze and try and peel it off after an hour or two. here's a photo of it http://www.dicegeorge.com/psb/psimg/...aster-snug.jpg [g] |
#20
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acetic acid wherefrom? - plaster peelaway
george (dicegeorge) wrote:
NT wrote: On Sep 12, 1:25 am, "george (dicegeorge)" wrote: Stuart Noble wrote: george (dicegeorge) wrote: Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Is it oil based paint you're removing? Alkali strippers won't touch emulsion. whoops i think its emulsion which someone smothered the moulding with.. so the peelaway might not work... [g] emulsion forms a very thin film, so is less troublesome re bulk. If there's bulk there and its not oil paint, its likely to be distemper. That's lime based and removes with acid. A good way to get acetic and other things most chemists dont stock is to look for a chemist's thats been there for decades and ask, explaining what you'll do with it. Reasonable chance they'll still have some things in stock from decades ago, and a person that would be happy to sell such things, once they know you know how to handle the stuff. NT White Vinegar is the acetic acid I need, thanks, I will try a big supermarket for it tomorrow, its used for trendy green organic cleaning, plus rubber gloves etc. But someone here said alkali strippers wont touch emulsion. There are thick layers of emulsion on the mouldings, it took me an hour to clear up a foot of it with plastic scraper water and toothbrush. Peelaway1 label says it will remove any combination of household paints and varnishes containing oil, lead, polyurethane or water so i'm hoping it will work. I will apply a thin layer on a test patch out of view, and then cover it with the gauze and try and peel it off after an hour or two. here's a photo of it http://www.dicegeorge.com/psb/psimg/...aster-snug.jpg [g] Good looking stuff. I can understand why you want to restore it. For all I know Peelaway may contain things other than sodium hydroxide to lift emulsion but, if it doesn't work, you could try one of the new Eco strippers http://www.axminster.co.uk/product.a...80&src=froogle Ludicrously expensive of course but you may find a wood finishing trade place will have their own version. "French polish suppliers" in yellow pages? As a cheap d-i-y experiment you could try loading a section with thick wallpaper paste and leaving it overnight. The soaking action plus gravity might pull the top layer off. Whatever you use it's gonna be a labour of love I fear :-) |
#21
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acetic acid wherefrom? - plaster peelaway
On Sep 13, 10:39*pm, "george (dicegeorge)"
wrote: NT wrote: On Sep 12, 1:25 am, "george (dicegeorge)" wrote: Stuart Noble wrote: george (dicegeorge) wrote: Where can I buy some dilute acetic acid from? I've bought some Peelaway from the internet to remove paint from plaster mouldings, it's made of Sodium Hydroxide, an alkali and it says i need dilute acetic acid to wash down afterwards. The kit even includes Litmus paper to check its been neutralised! I think its vinegar but that would stain the plasterwork wouldnt it? [g] Is it oil based paint you're removing? Alkali strippers won't touch emulsion. whoops i think its emulsion which someone smothered the moulding with.. so the peelaway might not work... [g] emulsion forms a very thin film, so is less troublesome re bulk. If there's bulk there and its not oil paint, its likely to be distemper. That's lime based and removes with acid. A good way to get acetic and other things most chemists dont stock is to look for a chemist's thats been there for decades and ask, explaining what you'll do with it. Reasonable chance they'll still have some things in stock from decades ago, and a person that would be happy to sell such things, once they know you know how to handle the stuff. NT White Vinegar is the acetic acid I need, thanks, I will try a big supermarket for it tomorrow, its used for trendy green organic cleaning, plus rubber gloves etc. But someone here said alkali strippers wont touch emulsion. There are thick layers of emulsion on the mouldings, it took me an hour to clear up a foot of it with plastic scraper water and toothbrush. Peelaway1 label says it will remove any combination of household paints and varnishes containing oil, lead, polyurethane or water so i'm hoping it will work. I will apply a thin layer on a test patch out of view, and then cover it with the gauze and try and peel it off after an hour or two. here's a photo of ithttp://www.dicegeorge.com/psb/psimg/hfc-plaster-snug.jpg [g] With something that old the bulk paint is normally distemper and/or oil paint. Emulsion doesnt normally form bulk. NT |
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