Homebrew PCBs

ST,

I failed to mention that I am using plumber's solder paste and paint the
board using an old tooth brush. I tried reflowing the paste with my hot air
gun but it didn't seem to matter. The brush put it on thin enough. 

The SMD paste contains tiny specs of solder so it is not the same as
plumber's paste. It would be cool if there was a way to take 1/8" diameter
solder and grind it up into tiny particles. Then it could be mixed with
plumber's paste and used to coat the board. Heat the board in a toaster oven
and it would be coated. Then wash to remove excess flux.

Rick

-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Stefan Trethan
Sent: Saturday, January 12, 2013 7:01 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] No HASL

You can use plumbing solder paste (with flux) and paint the board with it.,
then you heat the board with hot air or a hotplate..
The paste can be thinned with water to make it easier to apply, and it is
much cheaper than SMD paste.
Excess paste in bare areas and flux just washes off with hot water.

There will be lumps if you apply too much or unevenly, in that case
carefully wipe it off with a paper towel wad while molten.

ST


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