Solder mask solvent?

N

Neil Preston

Guest
Is there any suitable method of dissolving the green solder mask found on
most PC boards?

A cc: would be appreciated: npreston at swbell dot net

Thank you....
 
"Neil Preston" <npreston@no.spam.swbell.net> schreef in bericht
news:JyBxb.3095$Zd5.1264@newssvr24.news.prodigy.com...
Is there any suitable method of dissolving the green solder mask found on
most PC boards?

A cc: would be appreciated: npreston at swbell dot net

Thank you....


Acetone will do.
Click to expand...

petrus


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"Neil Preston" <npreston@no.spam.swbell.net> wrote in message
news:JyBxb.3095$Zd5.1264@newssvr24.news.prodigy.com...
Is there any suitable method of dissolving the green solder mask found on
most PC boards?

A cc: would be appreciated: npreston at swbell dot net

Thank you....


Hi Neil,
Click to expand...
To my knowledge, there is nothing chemical that will remove soldermask and
leave the board usable....I am assuming it is epoxy based???
If you have a number of expensive circuit boards that need it removed, your
only recourse would be to find a circuit board company with a laser drill.
They would be able to remove it cleanly. Hope that helps....Ross
 
"Ross Mac" <macroeng@example.invalid> schreef in bericht
news:Ehbyb.129568$Ec1.5390951@bgtnsc05-news.ops.worldnet.att.net...
"Neil Preston" <npreston@no.spam.swbell.net> wrote in message
news:JyBxb.3095$Zd5.1264@newssvr24.news.prodigy.com...
Is there any suitable method of dissolving the green solder mask found
on
most PC boards?

A cc: would be appreciated: npreston at swbell dot net

Thank you....


Hi Neil,
To my knowledge, there is nothing chemical that will remove soldermask and
leave the board usable....I am assuming it is epoxy based???
If you have a number of expensive circuit boards that need it removed,
your
only recourse would be to find a circuit board company with a laser drill.
They would be able to remove it cleanly. Hope that helps....Ross
Click to expand...
Ross,

Think we're talking about different things. Never get a board in my hands
having a green soldermask that did not solve with acetone. Never saw the
acetone affecting the epoxy either. Some component plastics or printing may
be affected however.

petrus



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"petrus bitbyter" <p.kralt@hccnet.nl> wrote in message
news:eek:Lvyb.93001$Rm.37096@amsnews02.chello.com...
"Ross Mac" <macroeng@example.invalid> schreef in bericht
news:Ehbyb.129568$Ec1.5390951@bgtnsc05-news.ops.worldnet.att.net...

"Neil Preston" <npreston@no.spam.swbell.net> wrote in message
news:JyBxb.3095$Zd5.1264@newssvr24.news.prodigy.com...
Is there any suitable method of dissolving the green solder mask found
on
most PC boards?

A cc: would be appreciated: npreston at swbell dot net

Thank you....


Hi Neil,
To my knowledge, there is nothing chemical that will remove soldermask
and
leave the board usable....I am assuming it is epoxy based???
If you have a number of expensive circuit boards that need it removed,
your
only recourse would be to find a circuit board company with a laser
drill.
They would be able to remove it cleanly. Hope that helps....Ross



Ross,

Think we're talking about different things. Never get a board in my hands
having a green soldermask that did not solve with acetone. Never saw the
acetone affecting the epoxy either. Some component plastics or printing
may
be affected however.

petrus



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.543 / Virus Database: 337 - Release Date: 22-11-2003

This comes from my 30 years around the PCB biz.....Ross
Click to expand...
 
"Ross Mac" <macroeng@example.invalid> schreef in bericht
news:zbByb.366452$0v4.19317376@bgtnsc04-news.ops.worldnet.att.net...
"petrus bitbyter" <p.kralt@hccnet.nl> wrote in message
news:eek:Lvyb.93001$Rm.37096@amsnews02.chello.com...

"Ross Mac" <macroeng@example.invalid> schreef in bericht
news:Ehbyb.129568$Ec1.5390951@bgtnsc05-news.ops.worldnet.att.net...

"Neil Preston" <npreston@no.spam.swbell.net> wrote in message
news:JyBxb.3095$Zd5.1264@newssvr24.news.prodigy.com...
Is there any suitable method of dissolving the green solder mask
found
on
most PC boards?

A cc: would be appreciated: npreston at swbell dot net

Thank you....


Hi Neil,
To my knowledge, there is nothing chemical that will remove soldermask
and
leave the board usable....I am assuming it is epoxy based???
If you have a number of expensive circuit boards that need it removed,
your
only recourse would be to find a circuit board company with a laser
drill.
They would be able to remove it cleanly. Hope that helps....Ross



Ross,

Think we're talking about different things. Never get a board in my
hands
having a green soldermask that did not solve with acetone. Never saw the
acetone affecting the epoxy either. Some component plastics or printing
may
be affected however.

petrus



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.543 / Virus Database: 337 - Release Date: 22-11-2003

This comes from my 30 years around the PCB biz.....Ross
Click to expand...
Well Ross,

You should have had more PCBs in your hands then I had. I remember too well
the times I tried to clean PCBs with acetone and got the green laquer along
with the dirt I want to remove. So I did not use acetone but ethanol (or
WS11) ever since. Nevertheless, the next piece of PCB I got in my hands -
some minutes ago - did *not* let its solder mask solve in acetone. So I
think you are right and my response was based on the wrong experience. (Old
experience although <30 years.) So sorry for the mistake and thanks for your
reply.

petrus




---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.543 / Virus Database: 337 - Release Date: 21-11-2003
 
"petrus bitbyter" <p.kralt@hccnet.nl> wrote in message
news:WMIyb.112939$Rm.6185@amsnews02.chello.com...
"Ross Mac" <macroeng@example.invalid> schreef in bericht
news:zbByb.366452$0v4.19317376@bgtnsc04-news.ops.worldnet.att.net...

"petrus bitbyter" <p.kralt@hccnet.nl> wrote in message
news:eek:Lvyb.93001$Rm.37096@amsnews02.chello.com...

"Ross Mac" <macroeng@example.invalid> schreef in bericht
news:Ehbyb.129568$Ec1.5390951@bgtnsc05-news.ops.worldnet.att.net...

"Neil Preston" <npreston@no.spam.swbell.net> wrote in message
news:JyBxb.3095$Zd5.1264@newssvr24.news.prodigy.com...
Is there any suitable method of dissolving the green solder mask
found
on
most PC boards?

A cc: would be appreciated: npreston at swbell dot net

Thank you....


Hi Neil,
To my knowledge, there is nothing chemical that will remove
soldermask
and
leave the board usable....I am assuming it is epoxy based???
If you have a number of expensive circuit boards that need it
removed,
your
only recourse would be to find a circuit board company with a laser
drill.
They would be able to remove it cleanly. Hope that helps....Ross



Ross,

Think we're talking about different things. Never get a board in my
hands
having a green soldermask that did not solve with acetone. Never saw
the
acetone affecting the epoxy either. Some component plastics or
printing
may
be affected however.

petrus



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.543 / Virus Database: 337 - Release Date: 22-11-2003

This comes from my 30 years around the PCB biz.....Ross



Well Ross,

You should have had more PCBs in your hands then I had. I remember too
well
the times I tried to clean PCBs with acetone and got the green laquer
along
with the dirt I want to remove. So I did not use acetone but ethanol (or
WS11) ever since. Nevertheless, the next piece of PCB I got in my hands -
some minutes ago - did *not* let its solder mask solve in acetone. So I
think you are right and my response was based on the wrong experience.
(Old
experience although <30 years.) So sorry for the mistake and thanks for
your
reply.

petrus




---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.543 / Virus Database: 337 - Release Date: 21-11-2003

Hi Petrus....
Click to expand...
I have never used acetone to remove what they call soldermask on PCB's and
it might remove it somewhat. In my experience in that biz was if we
accidentally got it on the wrong area it could not be removed adequately to
make the customer happy. When the laser drills showed up, someone came up
with the idea to ablate soldermask. You just set the machine up to burn down
to the foil. The C02 laser typically won't burn through copper so it's the
perfect tool. They use these machines for drilling blind holes .004 and
smaller at extremely high speeds. First they use a yag laser to drill
through the copper, then they follow up with a C02 laser to cook the glass
down to the next layer of copper. Then they fill the impression with
electroless copper for a connection...
In any event, this message got way off topic!!!....take care, Ross
 
Thanks for the replies, guys.

I use acetone all the time to remove flux residue after soldering. Won't
touch the soldermask they use nowadays.

I do repair of pro audio equipment and often have to repair burnt or broken
foil traces. So far the only thing I've been able to do is scrape it off or
otherwise abrade it off. But I'd prefer not to abrade the copper. And
sometimes the foils are difficult to get access to.

Keep looking!

Neil

"petrus bitbyter" <p.kralt@hccnet.nl> wrote in message
news:tT9yb.72277$Rm.22875@amsnews02.chello.com...
"Neil Preston" <npreston@no.spam.swbell.net> schreef in bericht
news:JyBxb.3095$Zd5.1264@newssvr24.news.prodigy.com...
Is there any suitable method of dissolving the green solder mask found
on
most PC boards?

A cc: would be appreciated: npreston at swbell dot net

Thank you....


Acetone will do.

petrus


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.543 / Virus Database: 337 - Release Date: 22-11-2003
Click to expand...
 
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