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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