Page 5 - Info Magazine nr 16 february march 2021

A fan-shaped piece of brass, approximately 0.5 mm thick, is
beaten into a rounded shape and the two edges are welded
together. (Brass is an alloy consisting of 70% copper and
30% zinc.) In this traditional method of construction, a skilled
craftsman beats the rounded tube into a bell shape using a
hammer. This is a "one-off" construction method and is used
for top-quality custom or "pro-model" instruments.

The components of the valve casing are fitted into a special
jig and then passed through a kiln to braze them together in
precise fashion.
Note: Brazing is a method for joining-like soldering-but uses
a much higher melting point and produces extremely strong
joints.

A craftsman assembles
the instrument by dili-
gently soldering together
the various components,
such as the bell and the
valve casings.
The surface of the instrument's
body is polished to a shine with
an abrasive-coated buffing cloth.

Before shipping, each indi-
vidual trumpet undergoes a
rigorous functional inspec-
tion (which includes testing
with an air leak tester and
a strobe checker as well as
pitch adjustment) and is
test-played.