OT: concentration of ferric chloride
I can get some ferric chloride for free, in powdered form. I don't suppose
anyone out there knows the concentration or molarity of the ferric chloride
etching solution? If I could find that out it would be a simple matter of
few chemistry equations to figure out how much I needed. Can someone please
help me?
Whats the other chemical thats used in etching? whats it's concentration?
Or is it in a liquid state at room tempature?
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anyone out there knows the concentration or molarity of the ferric chloride
etching solution? If I could find that out it would be a simple matter of
few chemistry equations to figure out how much I needed. Can someone please
help me?
Whats the other chemical thats used in etching? whats it's concentration?
Or is it in a liquid state at room tempature?
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Comments
I started by using ferric chloride for etching, and the experience was bad.
From what I saw, it's quite temperature-dependant, you have to keep it at
around 40 degrees celsius for it to be effective.
A friend of mine told me another way, and now I get beautiful boards:
- Once the board is insolated and developed, place it on a plastic tray
- Pour hydrochloric acid at 25% conc., which you should be able to get easy
(at least here in Spain I can get 3-litre bottles for around $2), until it
covers the board.
- With a syringe, pour drop by drop some strong (30% by volume) hydrogen
peroxide (H2O2). You will see the exposed copper dissolve.
- Carefully, don't let bubbles form, if you see some appearing, just pour a
little water to stop them, keep going until all unwanted copper has
dissolved.
- Take the board, rinse it very well, and polish with some nail-varnish
remover to get the final copper finish.
It works great for me!
Cheers,
Mike
>
Mensaje original
> De: ED Ward [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=k2fcMTxkTarVcASJeYozHhBt-5VFX65b-9KSkfZF6QLiYf4PsM81RSWYt6yNH4W7zDzVs-vnXmTp5LfOHvXX]punk__rocker@h...[/url
> Enviado el: mi
Chlorine gas so you should be under a vent hood or at least in a very
well-ventilated area. This is always a good idea anyway.
Regards,
Al Williams
AWC
* Tax special from now to April 17th. Order a copy of Microcontroller
Projects with Basic Stamps and get an ASP-II free.
http://www.al-williams.com/awce/sbook.htm
I am really careful with that now. I forgot to mention it, but it's true
that you release Chlorine gas, and it's not nice. Good ventilation is
essential.
Thanks for the remark, all the best,
Mike
>
Mensaje original
> De: Al Williams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=f6g56OcT32LEpmk6P9PoRW9gVkxP2rEi5meQLig-mBwmdae8qY8pvu2-_obDcWRCh0PNtOdokQw4cA]alw@a...[/url
> Enviado el: mi
> - Pour hydrochloric acid at 25% conc., which you should be able
> to get easy
> (at least here in Spain I can get 3-litre bottles for around $2), until it
> covers the board.
That is HCL (hydrochloric) not H2SO4 which is in fact Sulpheric.
Maybe we aren't talking about the same message. Anyway, let's just leave it
at: Be Careful Everyone.
Regards,
Al Williams
AWC
* Tax special from now to April 17th. Order a copy of Microcontroller
Projects with Basic Stamps and get an ASP-II free.
http://www.al-williams.com/awce/sbook.htm
put forth. What is the concentration of ferric chloride? It's probably
labeled right on the bottle.
I found out what the other stuff is, ammonium persulfate. The HCL idea
sounds interesting, assuming I can find HCL for that price here.
>From: "Al Williams" <alw@a...>
>Reply-To: basicstamps@egroups.com
>To: <basicstamps@egroups.com>
>Subject: RE: [noparse][[/noparse]basicstamps] OT: concentration of ferric chloride
>Date: Tue, 11 Apr 2000 21:04:25 -0500
>
>Here is the original text:
> > - Pour hydrochloric acid at 25% conc., which you should be able
> > to get easy
> > (at least here in Spain I can get 3-litre bottles for around $2), until
>it
> > covers the board.
>
>That is HCL (hydrochloric) not H2SO4 which is in fact Sulpheric.
>
>Maybe we aren't talking about the same message. Anyway, let's just leave it
>at: Be Careful Everyone.
>
>
>
>Regards,
>
>Al Williams
>AWC
>* Tax special from now to April 17th. Order a copy of Microcontroller
>Projects with Basic Stamps and get an ASP-II free.
>http://www.al-williams.com/awce/sbook.htm
>
>
>
>
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My Radio Shack bottle is labeled 31.47% FeCL3 & 68.53% H2O. Don't know how
this translates into your powder, but good luck.
Ray McArthur
Original Message
From: ED Ward <punk__rocker@h...>
To: <basicstamps@egroups.com>
Sent: Tuesday, April 11, 2000 11:36 PM
Subject: RE: [noparse][[/noparse]basicstamps] OT: concentration of ferric chloride
> This is all very fascinating, but no one has answered the actual question
I
> put forth. What is the concentration of ferric chloride? It's probably
> labeled right on the bottle.
>
> I found out what the other stuff is, ammonium persulfate. The HCL idea
> sounds interesting, assuming I can find HCL for that price here.
>
>
> >From: "Al Williams" <alw@a...>
> >Reply-To: basicstamps@egroups.com
> >To: <basicstamps@egroups.com>
> >Subject: RE: [noparse][[/noparse]basicstamps] OT: concentration of ferric chloride
> >Date: Tue, 11 Apr 2000 21:04:25 -0500
> >
> >Here is the original text:
> > > - Pour hydrochloric acid at 25% conc., which you should be able
> > > to get easy
> > > (at least here in Spain I can get 3-litre bottles for around $2),
until
> >it
> > > covers the board.
> >
> >That is HCL (hydrochloric) not H2SO4 which is in fact Sulpheric.
> >
> >Maybe we aren't talking about the same message. Anyway, let's just leave
it
> >at: Be Careful Everyone.
> >
> >
> >
> >Regards,
> >
> >Al Williams
> >AWC
> >* Tax special from now to April 17th. Order a copy of Microcontroller
> >Projects with Basic Stamps and get an ASP-II free.
> >http://www.al-williams.com/awce/sbook.htm
> >
> >
> >
> >
>
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail.com
>
>
>
>
Thanks, for your help...
>From: "rjmca" <rjmca@w...>
>Reply-To: basicstamps@egroups.com
>To: <basicstamps@egroups.com>
>Subject: Re: [noparse][[/noparse]basicstamps] OT: concentration of ferric chloride
>Date: Wed, 12 Apr 2000 01:32:59 -0400
>
>Ed:
>My Radio Shack bottle is labeled 31.47% FeCL3 & 68.53% H2O. Don't know how
>this translates into your powder, but good luck.
>
>Ray McArthur
>
>
Original Message
>From: ED Ward <punk__rocker@h...>
>To: <basicstamps@egroups.com>
>Sent: Tuesday, April 11, 2000 11:36 PM
>Subject: RE: [noparse][[/noparse]basicstamps] OT: concentration of ferric chloride
>
>
> > This is all very fascinating, but no one has answered the actual
>question
>I
> > put forth. What is the concentration of ferric chloride? It's probably
> > labeled right on the bottle.
> >
> > I found out what the other stuff is, ammonium persulfate. The HCL idea
> > sounds interesting, assuming I can find HCL for that price here.
> >
> >
> > >From: "Al Williams" <alw@a...>
> > >Reply-To: basicstamps@egroups.com
> > >To: <basicstamps@egroups.com>
> > >Subject: RE: [noparse][[/noparse]basicstamps] OT: concentration of ferric chloride
> > >Date: Tue, 11 Apr 2000 21:04:25 -0500
> > >
> > >Here is the original text:
> > > > - Pour hydrochloric acid at 25% conc., which you should be able
> > > > to get easy
> > > > (at least here in Spain I can get 3-litre bottles for around $2),
>until
> > >it
> > > > covers the board.
> > >
> > >That is HCL (hydrochloric) not H2SO4 which is in fact Sulpheric.
> > >
> > >Maybe we aren't talking about the same message. Anyway, let's just
>leave
>it
> > >at: Be Careful Everyone.
> > >
> > >
> > >
> > >Regards,
> > >
> > >Al Williams
> > >AWC
> > >* Tax special from now to April 17th. Order a copy of Microcontroller
> > >Projects with Basic Stamps and get an ASP-II free.
> > >http://www.al-williams.com/awce/sbook.htm
> > >
> > >
> > >
> > >
> >
> > ______________________________________________________
> > Get Your Private, Free Email at http://www.hotmail.com
> >
> >
> >
> >
>
>
>
>
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