Homebrew_PCBs

Hi all,

I would just like to ask where can buy the spray
photoresist. I have been searching the web for quite
some time and i can't find a web site that sells it.

Thank you.
-marc

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> I would just like to ask where can buy the spray
> photoresist. I have been searching the web for quite
> some time and i can't find a web site that sells it.

Believe GC Electronics makes some still. Go to GC/Waldom Dist.
locator list. http://www.gcwaldom.com/locator.html Mouser
www.mouser.com is a Dist. but don't think that they stock this
product anymore.

Ben

>From: Marc Rosales <mdr911@...>
>Reply-To: Homebrew_PCBs@yahoogroups.com
>To: Homebrew_PCBs@yahoogroups.com
>Subject: [Homebrew_PCBs] photoresist
>Date: Sun, 5 Oct 2003 18:11:05 -0700 (PDT)
>
>Hi all,
>
>I would just like to ask where can buy the spray
>photoresist. I have been searching the web for quite
>some time and i can't find a web site that sells it.

Electrolube used to make an aerosol resist, but I just checked their web
site and couldn't find it:

http://www.electrolube.com/

They changed the stuff a couple of years ago and the new formulation doesn't
work very wel;, perhaps they have withdrawn it as a result.

Leon
--
Leon Heller, G1HSM Tel: +44 1424 423947
Email:leon_heller@...
My web page: http://www.geocities.com/leon_heller

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Leon Heller wrote:

>
>>From: Marc Rosales <mdr911@...>
>>Reply-To: Homebrew_PCBs@yahoogroups.com
>>To: Homebrew_PCBs@yahoogroups.com
>>Subject: [Homebrew_PCBs] photoresist
>>Date: Sun, 5 Oct 2003 18:11:05 -0700 (PDT)
>>
>>Hi all,
>>
>>I would just like to ask where can buy the spray
>>photoresist. I have been searching the web for quite
>>some time and i can't find a web site that sells it.
>
> Electrolube used to make an aerosol resist, but I just checked their web
> site and couldn't find it:
>
> http://www.electrolube.com/
>
> They changed the stuff a couple of years ago and the new formulation doesn't
> work very wel;, perhaps they have withdrawn it as a result.

http://www.electrolube.com/product/techdata/eldata/PRP.DOC
http://www.electrolube.com/product/techdata/eldata/PRP-OLD.DOC

It works ok for me. Cleaning the copper of oil and preservative
is the most important step.

Thank you very for your replies.

Thank you for the reply. I have seen a spray photoresist in RS
components. they are selling it for around 15$(US). I'll try to see
if it will give good results


-marc

I coat 112 doublesided 6X9 boards with 1 100ft roll of negative laminate film. Costs about $100 per roil including shipping, I get boards for $2.25 , so to me - a coated board costs $3.15 each, Factor in the laminator (which should be a natural upgrade path for those switching from TT) with say a life of 10,000 boards @$0.03 each, A bottle of denatured alcohol, a spray bottle, a squeegee, and a razor knife. Still way under $4.00 a board.

The processing chems are cheap too.
A Tub of developer is $6.00 (sodium bicarbonate from pool supply - enough for 2000 boards) and stripper is $4.00 (red devil lye - enough for about 100 boards)

JT

----- Original Message -----
From: Dave Mucha
To: Homebrew_PCBs@yahoogroups.com
Sent: Friday, June 25, 2004 9:49 AM
Subject: [Homebrew_PCBs] Re: Seno 1000 liquid photoresist


--- In Homebrew_PCBs@yahoogroups.com, "gregben" <gregben@y...> wrote:
> Does anyone have any experience applying, exposing,
> developing, etc. with Seno 1000 photoresist? This
> is a positive-acting, dyed, aqueous developed and
> stripped liquid photoresist. The only place that I've
> found that sells it is Mega Electronics in the UK.
>
> I'm interested in this because I have easy access to high
> resolution laser photoplots and want to use photoresist
> for board-making instead of toner transfer.

My question is what are the things one looks for in a photo resist ?

dyed ?
positive ?
cost ? availability ?

What is available in the States at a reasonable cost ? and is that
better then buying pre-coated boards ?

Dave

There was a gentleman on here that offered me coated boards last
year, but never offered prices.

I am still mechanically etching, but after seeing that T-Tech go on E-
bay for $$$$ I may sell mine and buy Ballendos unit.

Dave






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