Percentage of tin and its solder effects compared - GIF

Percentage of tin and its solder effects compared.

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Previously:

Casting solder bars - GIF
Desoldering tweezers - GIF
Dip soldering an electrical terminal - GIF
Hot bar soldering - GIF
Micro laser soldering - video
NASA Technical Standard: Soldered Electrical Connections - PDF
Precision soldering - GIF
Soldering iron with wire dispenser - GIF

I have been Soldering since 1962, age 12, using my Dad's huge WW II 50 watt soldering BEAST.

This is the BEST description of lead to tin mix I have seen!

My "soldering" includes 3 years in U.S. ARMY Signal Corps Avionics Repair!

thanks,

philip, from the Great Pacific NorthWET, Oregon Division, USA