Don't make it that thick... will become hard to apply.
Actually we need a very fine coating, not a lump paint which will
cause some other issues after evaporating...
Using medical grade white spirit with rosin is recommended.
95 liquid:5rosin ratio is more then enough.
After this you can try PPD paste on pads, PPD paste contains : 63sn/37pb
Do some baking or hot blowing & see the difference. :)
On 02/09/2012, Sarath <sarath.er@gmail.com> wrote:
> Update -
>
> I got some rosin, mixed it with thinner at about 60:40 ratio and pained the
> back of the PCB. And after a while it solidified and is wonderful. Thank you
> for the suggestion.
>
> And BTW, If you are in Bangalore, rosin is available at a shop directly
> opposite of the avenue road Masjid, about 100 meters from the entrance of
> avenue road. He doesn't sell in small quantities, but its very cheap. Rupees
> 130 per Kilo Gram.
>
> Best regards.
> -Sarath
>
> --- In HamBrewers@yahoogroups.com, "Todd F. Carney" <carneytf@...> wrote:
>>
>> *Here's a few videos on rosin-based solder flux from Dangerous
>> Prototypes:*
>> *
>> *
>> *"DIY solder flux with rosin and alcohol"*
>> http://www.youtube.com/watch?v=iv_2ULCmA28&list=UULmqkcWEhEQNZy97ETIZn4A&index=11&feature=plcp
>> *
>> *
>> *"**Dangerous Prototypes Flux-Off solder flux test"*
>> https://www.youtube.com/watch?v=uJNjNOAxvqY&feature=plcp
>> *
>> *
>> *"**Dangerous Prototypes Flux-Off solder flux test, Part 2"*
>> https://www.youtube.com/watch?v=yTV8gtSX6tg&feature=plcp*
>> *
>> *In the States, most of the solder for electronics is "rosin core"--the
>> wire-like solder is actually a tube full of rosin flux.*
>> *
>> *
>> *Also, in the States "solder paste" is a mix of flux and solder used
>> mostly
>> for surface-mount PCBs and usually silk-screened on to the board and then
>> "reflowed" (melted) after components are placed. Now, I use a flux that
>> is
>> in a "paste" form, but it's not called "solder paste" here. I suppose one
>> could call it "pasty flux," but I wouldn't.*
>>
>> *Best,*
>> *
>> *
>> *Todd*
>> ----------------------------------------------------------
>> K7TFC / Medford, Oregon, USA / CN82ni
>> "Done is better than perfect." --Anonymous
>> *
>> *
>> *
>> *
>> On Tue, Aug 28, 2012 at 2:00 AM, gareth evans <headstone_255@...>wrote:
>>
>> > **
>> >
>> >
>> > 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
>> >
>> >
>>
>
>
>
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