Homebrew_PCBs

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.

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.

On Fri, 27 May 2016 18:32:09 -0700, you wrote:

>Yeah I remember muriatic acid – used to use it to clean our pool. That was seriously nasty stuff – I’m a bit uneasy about bringing it back into my life. That’s why I was thinking etchant. I can’t remember – you *can* pour it into a standard plastic tub right?

Yes, and it's generally mixed one part HCL with 4 parts of drugstore
peroxide. Pour the acid into the peroxide. Works wonders, watch
because it can be quick. Then you need to heat it and bubble air into
it once the peroxide goes.

FeCL3 is nastier, it's almost the same stuff and stains
enthusiastically.


Harvey

>
>
>
>From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
>Sent: Friday, May 27, 2016 4:33 PM
>To: Homebrew_PCBs@yahoogroups.com
>Subject: [Homebrew_PCBs] Re: Amount of etchant needed
>
>
>
>
>
>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.
>
>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.
>
>

and oddly enough, muriatic acid (and peroxide) is an etchant.

On Fri, 27 May 2016 18:32:09 -0700, you wrote:

Yeah I remember muriatic acid – used to use it to clean our pool.  That was seriously nasty stuff – I’m a bit uneasy about bringing it back into my life.  That’s why I was thinking etchant.  I can’t remember – you *can* pour it into a standard plastic tub right?

Yes, and it's generally mixed one part HCL with 4 parts of drugstore
peroxide.  Pour the acid into the peroxide.  Works wonders, watch
because it can be quick.  Then you need to heat it and bubble air into
it once the peroxide goes.

FeCL3 is nastier, it's almost the same stuff and stains
enthusiastically.


Harvey

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] 
Sent: Friday, May 27, 2016 4:33 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: Amount of etchant needed



 

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.

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.

------------------------------------
Posted by: Harvey White <madyn@...>
------------------------------------

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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 it’s 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

>
>Dave
>
>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
>
>
>
>
>
>Yeah I remember muriatic acid – used to use it to clean our pool. That was seriously nasty stuff – I’m a bit uneasy about bringing it back into my life. That’s why I was thinking etchant. I can’t remember – you *can* pour it into a standard plastic tub right?
>
>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
>
>
>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.
>
>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.
>
>
>
>
>

In article <02fb01d1b8b8$d85b9970$8912cc50$@...>,
'Dave Wade' dave.g4ugm@... [Homebrew_PCBs]
<Homebrew_PCBs@yahoogroups.com> wrote:

> Hydrochloric Acid

That is it's proper chemical name, recognised by Chemists all over the
world. Others are historic or local names.

--
Stuart Winsor

Tools With A Mission
sending tools across the world
http://www.twam.co.uk/

Muriatic acid is hydrochloric acid at a particular concentration (20-30%. IIRC); purity is not particularly important for many applications, and may not be guaranteed in hardware store supplies.

Donald.

----- Original Message -----
> From: "lists Stuartlists@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com>
> To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> Sent: Friday, June 10, 2016 5:05:46 AM
> Subject: Re: [Homebrew_PCBs] Re: Amount of etchant needed
>
> In article <02fb01d1b8b8$d85b9970$8912cc50$@...>,
> 'Dave Wade' dave.g4ugm@... [Homebrew_PCBs]
> <Homebrew_PCBs@yahoogroups.com> wrote:
> > Hydrochloric Acid
>
> That is it's proper chemical name, recognised by Chemists all over the
> world. Others are historic or local names.
>
> --
> Stuart Winsor
>
> Tools With A Mission
> sending tools across the world
> http://www.twam.co.uk/
>
>