On Thu, 15 Aug 2013 07:14:57 +0100 (BST), you wrote:
>Hi
>Thanks for the quick response
>See what I mean by price, if you start using that then just as well buy ready made PCBs and forget DIY
>Lets see if theirs any other ideas out there
The liquid tin that I use (MG chemicals) will last about a year's
production of boards, so the cost per board is not horrible. The same
size board (professionally done) is at least 22.00 USD, I'm going to
guess that the tinning adds between 50 cents and a dollar to the board
cost, and I suspect that this is a high cost based on a one year use.
The other way (which I have not heard of being done at home), is HASL,
Hot Air Solder Leveling. I can see several ways of doing it, but I
would worry about the stress on the epoxy bond due to all the heat.
The chemical tin plating is not a hot process.
Harvey
>
>
>________________________________
> From: James <bitsyboffin@...>
>To: Homebrew_PCBs@yahoogroups.com
>Sent: Thursday, 15 August 2013, 7:04
>Subject: Re: [Homebrew_PCBs] silver coating
>
>
>
>
>On 15/08/13 18:00, David wrote:
>>
>> Hi
>> Do any of you people here know of a quick and cheap way to tin copper
>> PCB tracks before populating the board?
>> With all the modern chemicals around these days theirs bound to
>> something out there
>> In the past have used the manufactured stuff which you just put in a
>> bath for a while and job done but its to expensive.
>>
>There is basically that (tinnit, liquidtin), and a product called "Cool
>Amp" http://www.cool-amp.com/cool_amp.html
>
>I've never found any reasonable "home brew" recipe for such a product.
>
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