"micky"

He calls it dry solder.


** In fact he said " Dry solder joint " - a very common term.

The word dry refers to a lack of " wetting " of one or both the metal
surfaces to be soldered.

If an otherwise solderable metal surface is contaminated with oxides or
similar, hot solder will simply refuse to alloy with it and there will be no
or only minimal electrical connection and no mechanical strength.

A frosted appearance on the joint is generally due to movement while
cooling, insufficient heat or the use of lead free solder.


..... Phil