why does a brass door knob 1920s look so different than one from the 1980s?
In: 392
Lead.
Brass traditionally used up to 3.5% lead. As we “de-leaded,” the lead content went way down. Plumbing fixtures now require the use of zero lead brass, and that is the way things are headed.
On the plus side, if your kid licks that 1980s door knob, there is less of a chance that they won’t be able to do math later on…
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