where does Muntz Metal fit into this range?


Eric Hammarberg
Associate Director of Preservation
Associate
LZA Technology
641 Avenue of the Americas
New York, NY 10011-2014
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-----Original Message-----
From: Mark Rabinowitz [mailto:[log in to unmask]]
Sent: Sunday, November 11, 2001 6:18 PM
To: [log in to unmask]
Subject: Re: What is "old brass"?


Brass, like bronze, is a generic term for a vast variety of copper alloys.
Brass is generally categorized as a 65%copper/ 35%zinc alloy but there can
be a great deal of variation in that ratio and also a range of other metals
can be added to change the characteristics.  Navel brass, red brass, yellow
brass all are commercially available and all are naturally colored
differently (red brass is actually a bronze which usually is an alloy with
more than 80% copper).

And that does not include the vast array of chemical patinas and toned
coatings that are used to further adjust the color.  What is the reference
to old brass referring to?

Mark

----- Original Message -----
From: Met History <mailto:[log in to unmask]>
To: [log in to unmask]
<mailto:[log in to unmask]>
Sent: Sunday, November 11, 2001 9:13 AM
Subject: What is "old brass"?

There is Donald Trump brass - not just highly polished and shiny, but very
yellow.  And there is "old brass", which is more orange.   What, chemically,
"old brass"?

Christopher