I assume you're serious about the foodstuffs. (And why not? I reflow in a
wok. Oil-free of course.)
So, I could just dip the board in a solder pot, and then wipe it with a damp
rag (or blow it off with hot air). For that matter, the solder pot can be an
old pan.
I don't follow you on the second part. Vinegar and salt?
My initial interest was to use the tinning as an etch resist. Come to think
of it, electroplating tin could be about the same cost as a suitably sized
solder pot. Since heat isn't involved, it could work with both inkjet and
toner. I think I'll have a tink on that for a bit...
----- Original Message -----
From: "KeepIt SimpleStupid" <keepitsimplestupid@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, July 24, 2008 9:58 AM
Subject: Re: [Homebrew_PCBs] Solder pot tinning and etch resist
> Hey Mike:
>
> Have you tried heating the board in peanut oil. It's not the best stuff,
> but it works. With the old lead tin stuff, I was able to:
>
> 1: Heat the board
> 2. Pull it out and add some solder to the traces
> 3. Dip back in and use a damp rag to spread
>
> The boards come out oily, but very nice.
>
> \Where to go:
>
> 1. Use something other than peanut oil
> 2. experiment with two baths; flux
> 3. Prep board (vinegar and salt); add flux; heat board; dip board; wipe
> board
> 4. Lead free solder
>
> Better than tin any day.
>
>
>
> ----- Original Message ----
> From: Mike Young <mikewhy@...>
> To: Homebrew_PCBs@yahoogroups.com
> Sent: Thursday, July 24, 2008 9:59:05 AM
> Subject: [Homebrew_PCBs] Solder pot tinning and etch resist
>
>
> I'm wondering about the practicality of tinning bare copper on PCBs by
> dipping into a solder pot. If the board is masked with a negative image,
> the tinning can also form the the resist for etching. My interest is
> two-fold. Tinning would protect the copper, and the negative image would
> place toner transfer pinholes and defects into the etch area. My hope is
> that they can be either undercut and dissolved during etching, or simply
> left in place or wirebrushed away. I don't have a solder pot to experiment
> with, and was about to purchase a small one to strip and tin enamel leads.
> Larger pots, suitable for dipping small PCBs, cost not much more. I was
> wondering if it would be worth the added expense.
>
> Thanks.
> Mike.
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
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