Yes, the terms vary, and the alloys change, but white metal - pot metal -
Mazak - Zamac - (other) names generally refer to various alloys consisting
primarily of zinc.
http://en.wikipedia.org/wiki/Pot_metal
http://www.pmsdiecasting.co.uk/zn-section/design/

The fine detail that can be reproduced/attained by casting small parts in
pot metal is one of it's better attributes.

There are some parts that are made poorly with pot metal, particularly when
the cross-sectional dimension is very thin.
Some of the poorer grades/alloys deteriorate badly with age.

The better pot metal grades are somewhat similar to cast aluminum, but cast
aluminum is more expensive both in raw material and casting costs.

Many grades of newer technology, reinforced synthetics are much more durable
than many presently used grades of pot metal.

As far as making small parts, pot metal casting is a relatively easy
process, which can essentially be done in a typical kitchen, or at a
workbench.

--
Cheers,
WB
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wrote in message
...

I never heard of "Mazak".Is this the equivalent of what I've known as
"white metal"? It is non ferrous, absolute crap,very brittle and it
will crumble if stressed. Lenny