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Question about etching pcb's
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Copper clad board using muriatic acid would like to find better than 3% hydrogen peroxide if possible. In the usa LA california to be exact. Also what are some of the better methods of making a pcb cheaply? BTW if needed I have 99 uv led on a circuit board built that a while ago just would need a cheap uv kinda etch resist suggestions welcome there. terramir? |
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Look for clear hair bleach. I think it's around 12% (40 deg. Baume?);
strong enough to burn your bare hands. I understand janatorial supply shops have it even stronger, but it starts to get dangerous and these days may find the police checking you out. I got mine from the local Sally Beauty Supply. In this part of the US they seem to show up near WalMarts. On Fri, 6 Apr 2018 21:45:00 -0700, you wrote: Copper clad board using muriatic acid would like to find better than 3%--- This email has been checked for viruses by AVG. |
开云体育Volume 40 developer for hair dye is about 12% Lower volume numbers of course have less peroxide in them ? ? From: Homebrew_PCBs@... [mailto:Homebrew_PCBs@...]
Sent: Saturday, April 07, 2018 5:23 PM To: Homebrew_PCBs@... Subject: Re: [Homebrew_PCBs] Question about etching pcb's ? ? Look for clear hair bleach. I think it's around 12% (40 deg. Baume?); |
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Please do not call it "bleach", it is not chlorine, it is hydrogen peroxide.
Someone coming across this thread may be confused by this. I have no idea what would happen if chlorine bleach and hydrochloric acid were mixed. Steve Greenfield AE7HD ---In Homebrew_PCBs@..., <kabowers@...> wrote : Look for clear hair bleach. I think it's around 12% (40 deg. Baume?); strong enough to burn your bare hands. I understand janatorial supply shops have it even stronger, but it starts to get dangerous and these days may find the police checking you out. I got mine from the local Sally Beauty Supply. In this part of the US they seem to show up near WalMarts. |
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Brad Thompson
On 4/8/2018 8:38 PM, alienrelics@... [Homebrew_PCBs] wrote:
Please do not call it "bleach", it is not chlorine, it is hydrogen peroxide.Hello-- A Wiki search states... "The chemical equation for bleach and hydrochloric acid is as follows: NaClO + 2 HCl ----> Cl2 + H2O + NaCl. In other words, sodium hypochlorite and hydrochloric acid make saltwater and chlorine gas. ... Chlorine gas is highly reactive because the bond between the two chlorine atoms is weak..." (According to various news outlets, Syria's Assad regime is using chlorine gas or another related weaponized chlorine compound against civilians, causing many casualties.) Under NO circumstances should you mix these chemicals to use an an experimental PC-board etchant! 73-- Brad AA1IP |
开云体育As a beauticians product, it IS a bleach - HAIR bleach, as the
writer specified.? It is not LAUNDRY bleach.? Just as not all
acids are HCl, not all bleaches are chlorine based.? Norm? w6nim
On 4/8/2018 5:38 PM,
alienrelics@... [Homebrew_PCBs] wrote:
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On Mon, 9 Apr 2018 00:22:32 -0700, you wrote:
As a beauticians product, it IS a bleach - HAIR bleach, as the writerPerhaps not all people would make that distinction. Harvey
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Steven Greenfield AE7HD