On Sat, 28 May 2016 09:13:40 +0100, you wrote:
>Why do they insist on giving it multiple names, its Hydrochloric Acid , in Spain its called Agua Fuerte and its noxious stuff. I think I slightly prefer Ferric Chloride but only slightly
You really need a fume cupboard or to use outside.
The older name is likely derived from popular sources, perhaps the use
of the acid in alchemy. The name aqua regia (Nitric and hydrochloric
acids) was named such because it dissolved the "royal" metals such as
gold and platinum).
and I do all the etching outside, anyway. HCL mixtures or ferric
chloride.
Harvey
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>Dave
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>From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
>Sent: 28 May 2016 02:32
>To: Homebrew_PCBs@yahoogroups.com
>Subject: RE: [Homebrew_PCBs] Re: Amount of etchant needed
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>Yeah I remember muriatic acid used to use it to clean our pool. That was seriously nasty stuff Im a bit uneasy about bringing it back into my life. Thats why I was thinking etchant. I cant remember you ∗can∗ pour it into a standard plastic tub right?
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>From: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs@yahoogroups.com> [mailto:Homebrew_PCBs@yahoogroups.com]
>Sent: Friday, May 27, 2016 4:33 PM
>To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs@yahoogroups.com>
>Subject: [Homebrew_PCBs] Re: Amount of etchant needed
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>There is no need to order echant. Go to the hardware store and buy a bottle of muriatic acid, peroxide at the grocery. 2 parts hydrogen peroxide and 1 part muriatic acid. Always add the acid to the peroxide to prevent splashing. Wear gloves and eye protection. Use is a well ventilated area.
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>The mixture is clear so it is easy to see when the etching is done. Mix enough to cover the board. Toss it when your are done as it is very cheap. Don't poor down the drain. Makes a great cleaner for sidewalk stains. Cut with some water.
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