Homebrew PCBs

I've posted this mixture before:

Mix 3.8 grams of Stannous chloride into 1 liter of
distilled water that is at 80 to 120 degrees
fahrenheit in temperature. Stir well until dissolved.
Add 49.5 grams of thiourea to the dissolved stannous
chloride and distilled water while maintaing the
temperature between 80 and 120 degrees fahrenheit.
Stir well until dissolved. Add 12 ml of sulfuric acid
to this mixture (Be careful! As you add the acid the
mixture is going to get HOT! Also, Always, ALWAYS add
acids to water. Never, NEVER add water to acids!).
Stir well. 

You are now the proud owner of electroless tinning
solution. 


Best regards

Marvin Dickens
Alpharetta, Georgia USA



--- JanRwl@... wrote:
   Some
> chemist "in here" please tell 
> us!  
> Jan Rowland


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