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Joined: Sep 2001
Posts: 6,296
Carpal Tunnel
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Carpal Tunnel
Joined: Sep 2001
Posts: 6,296 |
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Joined: Jan 2001
Posts: 13,858
Carpal Tunnel
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OP
Carpal Tunnel
Joined: Jan 2001
Posts: 13,858 |
Dear WW: everything is in metric now, and a good thing too. Grains, minims - too complicated
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Joined: Sep 2001
Posts: 6,296
Carpal Tunnel
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Carpal Tunnel
Joined: Sep 2001
Posts: 6,296 |
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Joined: Jan 2001
Posts: 13,858
Carpal Tunnel
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OP
Carpal Tunnel
Joined: Jan 2001
Posts: 13,858 |
In using lead-tin solder in large quantities, as in repairing a large galvanized iron pail, the molten solder oxidizes on to forming a film of dross that must be skimmed off, as it can interfere with solder adhering to the work. In working on printed circuit boards with a very small soldering iron and rosin core solder, the iron tip has to be wiped immediately before being used for the same reason. So the inert powdery oxides of the solder is called dross. As a metaphor the term can be used to mean something worthless as dregs in something of value.
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