Homebrew PCBs

Hi,

     Would someone please let me know where I can purchase Positive 
Photo Resist in a spray can, mail order, in the US? I have done a 
bunch of searches and have had no luck. I have seen others ask this 
same question but have yet to see an answer. Your information would 
sure be appreciated. Thanks - Jack

I recently asked this as well.  From the archives, the only place I could find 
in the US is www.thinktink.com for a dry-film laminated method.  I'm still 
also looking for a spray-can source in the US.

Cheers,
-Neil.



On Saturday 05 July 2003 14:48, jackafaz scribbled:

> Hi,
>
>      Would someone please let me know where I can purchase Positive
> Photo Resist in a spray can, mail order, in the US? I have done a
> bunch of searches and have had no luck. I have seen others ask this
> same question but have yet to see an answer. Your information would
> sure be appreciated. Thanks - Jack
>
>
>
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> To unsubscribe from this group, send an email to:
> Homebrew_PCBs-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
> ---
> [This E-mail scanned for viruses]

The only one that makes it that I know of is GC Electronics.

Cat.# 22-0074-0000

Now I am not sure about a stocking dist., so far the ones I looked 
up don't seem to stock this product.

I used it 11 or so years ago found it more trouble than it was worth 
to use.

I use MG Chemicals presensitized boards 600 series,  have very good 
results using them.  GC Electronics also makes some also.

For the MG Chemicals I buy them thru Circuits Specialist, Inc.   
www.web-tronics.com   Circuit Specialist also has some pos. 
presensitized boards slightly lower price than the MG Chemicals but 
I have not tried them.  You can also get most everything you need in 
supplies at Circuit Specialists.

Ben H. Lanmon
bhleavi@...
benhlanmon@...

--- In Homebrew_PCBs@yahoogroups.com, Neil <cobra_neil@a...> wrote:
> I recently asked this as well.  From the archives, the only place 
I could find 
> in the US is www.thinktink.com for a dry-film laminated method.  
I'm still 
> also looking for a spray-can source in the US.
> 
> Cheers,
> -Neil.
> 
> 
> 
> On Saturday 05 July 2003 14:48, jackafaz scribbled:
> > Hi,
> >
> >      Would someone please let me know where I can purchase 
Positive
> > Photo Resist in a spray can, mail order, in the US? I have done a
> > bunch of searches and have had no luck. I have seen others ask 
this
> > same question but have yet to see an answer. Your information 
would
> > sure be appreciated. Thanks - Jack
> >
> >
> >
> > Be sure to visit the group home and check for new Bookmarks and 
files:
> > http://groups.yahoo.com/group/Homebrew_PCBs
> >
> > To unsubscribe from this group, send an email to:
> > Homebrew_PCBs-unsubscribe@yahoogroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to 
http://docs.yahoo.com/info/terms/

> >
> >
> > ---
> > [This E-mail scanned for viruses]

The spray you need is named POSITIVE 20 made by KONTAKT CHEMIE  has Art.
No. 20.820.6.04.25.02
I got my last can from the UK, but can't find the source right now.
I used Circuit Specialists for a while until they jacked up the price
too much, then I found

http://www.oselectronics.com/ose_p78.htm

6" X 9" double side board for $9.90

About the Positive 20:
 I used it for many years, the trick is to clean the PCB ONLY with Ajax
powder and water. Make a small paper towel pad, wet it and the board
then apply Ajax powder and rub in small circles. DO NOT use wire wool.
The reason: Ajax powder makes the surface much smoother and when you
spray the Positive 20 on it, the surface tension is far lower and it
allows the Positive 20  to spreads in an even film. ( no need to spin it
and all that other crap... )
If you use wire wool the Positive 20 will bead and not spread, and after
using wire wool there is NO hope of getting Positive 20 to spread evenly
unless you spin it... and that's a big mess.
Dry it in a dust free environment, you can also speed up drying by
placing in a warm oven.
Positive 20 exposes fine with a Garden Grow Lamp, and develops very well
using household Lye ( I use Red Devil Lye)

Good luck...
hansw
PS may be some one form UK knows where it can be purchased.



Ben wrote:

>  The only one that makes it that I know of is GC Electronics.
>
> Cat.# 22-0074-0000
>
> Now I am not sure about a stocking dist., so far the ones I looked
> up don't seem to stock this product.
>
> I used it 11 or so years ago found it more trouble than it was worth
> to use.
>
> I use MG Chemicals presensitized boards 600 series,  have very good
> results using them.  GC Electronics also makes some also.
>
> For the MG Chemicals I buy them thru Circuits Specialist, Inc.
> www.web-tronics.com   Circuit Specialist also has some pos.
> presensitized boards slightly lower price than the MG Chemicals but
> I have not tried them.  You can also get most everything you need in
> supplies at Circuit Specialists.
>
> Ben H. Lanmon
> bhleavi@...
> benhlanmon@...
>
> --- In Homebrew_PCBs@yahoogroups.com, Neil <cobra_neil@a...> wrote:
> > I recently asked this as well.  From the archives, the only place
> I could find
> > in the US is www.thinktink.com for a dry-film laminated method.
> I'm still
> > also looking for a spray-can source in the US.
> >
> > Cheers,
> > -Neil.
> >
> >
> >
> > On Saturday 05 July 2003 14:48, jackafaz scribbled:
> > > Hi,
> > >
> > >      Would someone please let me know where I can purchase
> Positive
> > > Photo Resist in a spray can, mail order, in the US? I have done a
> > > bunch of searches and have had no luck. I have seen others ask
> this
> > > same question but have yet to see an answer. Your information
> would
> > > sure be appreciated. Thanks - Jack
> > >
> > >
> > >
> > > Be sure to visit the group home and check for new Bookmarks and
> files:
> > > http://groups.yahoo.com/group/Homebrew_PCBs
> > >
> > > To unsubscribe from this group, send an email to:
> > > Homebrew_PCBs-unsubscribe@yahoogroups.com
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > > ---
> > > [This E-mail scanned for viruses]
>
>
>                    Yahoo! Groups Sponsor
                        ADVERTISEMENT
                         [Click Here!]

>
> Be sure to visit the group home and check for new Bookmarks and files:
>
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> To unsubscribe from this group, send an email to:
> Homebrew_PCBs-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.


[Non-text portions of this message have been removed]

>The spray you need is named POSITIVE 20 made by KONTAKT CHEMIE  has Art.
>No. 20.820.6.04.25.02
>I got my last can from the UK, but can't find the source right now.
>I used Circuit Specialists for a while until they jacked up the price
>too much, then I found
>
>http://www.oselectronics.com/ose_p78.htm
>
>6" X 9" double side board for $9.90
>
>About the Positive 20:
> I used it for many years, the trick is to clean the PCB ONLY with Ajax
>powder and water. Make a small paper towel pad, wet it and the board
>then apply Ajax powder and rub in small circles. DO NOT use wire wool.
>The reason: Ajax powder makes the surface much smoother and when you
>spray the Positive 20 on it, the surface tension is far lower and it
>allows the Positive 20  to spreads in an even film. ( no need to spin it
>and all that other crap... )
>If you use wire wool the Positive 20 will bead and not spread, and after
>using wire wool there is NO hope of getting Positive 20 to spread evenly
>unless you spin it... and that's a big mess.
>Dry it in a dust free environment, you can also speed up drying by
>placing in a warm oven.
>Positive 20 exposes fine with a Garden Grow Lamp, and develops very well
>using household Lye ( I use Red Devil Lye)
>
>Good luck...
>hansw
>PS may be some one form UK knows where it can be purchased.

www.schuricht.de or www.distrelec.com do have this product. No idea
though if they deliver to the US. Worth a try though since they also
have an online shop. 

I haven't followed the thread, but I wonder why one want's to use this
spray. I use either pre coated material or then dry film resist, but
anyways....

Markus

jackafaz wrote:
> Hi,
> 
>      Would someone please let me know where I can purchase Positive 
> Photo Resist in a spray can, mail order, in the US? I have done a 
> bunch of searches and have had no luck. I have seen others ask this 
> same question but have yet to see an answer. Your information would 
> sure be appreciated. Thanks - Jack

http://www.google.com.au/search?hl=en&ie=UTF-8&oe=UTF-8&q=prp+photoresist&btnG=Google+Search&meta=
http://www.electrolube.com/product/techdata/eldata/PRP.doc

Look for an electrolube agent.

Doing some Google Searching and found some pos. photo resist.

Injectoral
http://www.injectorall.com/photoresist.htm


Ben

--- In Homebrew_PCBs@yahoogroups.com, "Ben" <bhleavi@y...> wrote:
> The only one that makes it that I know of is GC Electronics.
> 
> Cat.# 22-0074-0000
> 
> Now I am not sure about a stocking dist., so far the ones I looked 
> up don't seem to stock this product.
> 
> I used it 11 or so years ago found it more trouble than it was 
worth 
> to use.
> 
> I use MG Chemicals presensitized boards 600 series,  have very 
good 
> results using them.  GC Electronics also makes some also.
> 
> For the MG Chemicals I buy them thru Circuits Specialist, Inc.   
> www.web-tronics.com   Circuit Specialist also has some pos. 
> presensitized boards slightly lower price than the MG Chemicals 
but 
> I have not tried them.  You can also get most everything you need 
in 
> supplies at Circuit Specialists.
> 
> Ben H. Lanmon
> bhleavi@y...
> benhlanmon@e...
> 
> --- In Homebrew_PCBs@yahoogroups.com, Neil <cobra_neil@a...> wrote:
> > I recently asked this as well.  From the archives, the only 
place 
> I could find 
> > in the US is www.thinktink.com for a dry-film laminated method.  
> I'm still 
> > also looking for a spray-can source in the US.
> > 
> > Cheers,
> > -Neil.
> > 
> > 
> > 
> > On Saturday 05 July 2003 14:48, jackafaz scribbled:
> > > Hi,
> > >
> > >      Would someone please let me know where I can purchase 
> Positive
> > > Photo Resist in a spray can, mail order, in the US? I have 
done a
> > > bunch of searches and have had no luck. I have seen others ask 
> this
> > > same question but have yet to see an answer. Your information 
> would
> > > sure be appreciated. Thanks - Jack
> > >
> > >
> > >
> > > Be sure to visit the group home and check for new Bookmarks 
and 

> files:
> > > http://groups.yahoo.com/group/Homebrew_PCBs
> > >
> > > To unsubscribe from this group, send an email to:
> > > Homebrew_PCBs-unsubscribe@yahoogroups.com
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to 
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > > ---
> > > [This E-mail scanned for viruses]

Are you really sure you want to use the spray on stuff? Here's the 
acute and chronic effects section of its MSDS

ACUTE EFFECTS: Eye and skin contact can cause irritation, itching, 
redness, tearing, burning and inflammation. Inhalation, ingestion 
and skin absorption can cause headache, nausea, vomiting, dizziness, 
weakness, drowsiness, narcosis and exhaustion. Ingestion of large 
quantities can cause kidney and liver damage.

 

CHRONIC EFFECTS: Prolonged, repeated contact with skin can cause 
absorption of harmful amounts of material.  Prolonged, repeated 
exposure can cause chronic effects with symptoms as described above 
and other effects including anemia, hematological effects, damage to 
bone marrow, kidney' liver and testes.

 

NOTE: When laboratory animals have been exposed to 2-ethoxyethyl 
acetate birth defects and adverse effects on pregnancy have been 
observed.


No mystery why its not very common.


--- In Homebrew_PCBs@yahoogroups.com, "jackafaz" <greeneaz@e...> 
wrote:
> Hi,
> 
>      Would someone please let me know where I can purchase 
Positive 
> Photo Resist in a spray can, mail order, in the US? I have done a 
> bunch of searches and have had no luck. I have seen others ask 
this 
> same question but have yet to see an answer. Your information 
would 
> sure be appreciated. Thanks - Jack

----- Original Message ----- 

From: "ghidera2000" <ghidera2000@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, July 06, 2003 4:49 AM
Subject: [Homebrew_PCBs] Re: Positive resist


> Are you really sure you want to use the spray on stuff? Here's the
> acute and chronic effects section of its MSDS

[deleted]

I've used it occasionally, and haven't noticed anything untoward. The
current stuff from Electrolube doesn't work very well, though. They changed
suppliers, the old stuff was much better.

Leon
--
Leon Heller, G1HSM
leon_heller@...
http://www.geocities.com/leon_heller