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A question from the UK, where health and safety laws can
make it difficult to get hold of some materials, what exactly
do you mean by, "Rosin"?
73 de Gareth G4SDW (nee G8DXY) GQRP #3339
--- On Tue, 28/8/12, Sandeep Lohia <sandeeplohia12@gmail.com> wrote:PPD Solder Paste can be used to TIN Pads.
Bare copper gets oxidizes soon after eitching, changing it's colour and
making it hard for soldering components after some ageing.
What I do is I dilute rosin in sprit, and give a fine coating of this
solution first, then I simply recycle used desoldering wick to TIN
PADS of small homebreawe PCB. Tinning entire homebrewed PCB is not
that important, as on commercial PCB Tinning is again coated with some
solder-resist masking. Just the Pads are left.
After Eitching homebrew PCB with ferric chloride, I immidetly coat it
with dilute rosin, then I put used de-soldering wick on Pads and apply
some heat & pressure with soldering iron, this causes to flow TIN/Lead
alloy out of wick making a fine coating on Pads.
*For very fine and small SSOP or BGA Pads, PPD paste can be used, but
it needs some baking, with hot air or stove.
PPD paste is readily available with mobile repair vendors.
Am not very expert with, & just sharying some practical work with
small recycling. :)
73's VU3SXT.
On 28/08/2012, Sarath <sarath.er@gmail.com> wrote:
> I have been making a few PCBs recently, I do not own a solder pot, and
> having trouble tinning these PCBs.
>
> I read about some products that could be used be used to tin the PCBs called
> liquid tin and some tinning powders. I would like to know if such products
> are available here in Bangalore, Or if you all use any other methods, or
> tricks to tin the PCBs.
>
> Regards,
> -Sarath
>
>
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