Pirastro describes the Pirazzi Gold strings as follows:
The core material of all four string lines, Evah Pirazzi Gold, Evah Pirazzi, Obligato and Violino consists of a new synthetic material that we have co-developed with our supplier and which we obtain exclusively.
We are convinced that this new core material is superior to other synthetic materials and steel, because:
it offers an unmatched wide range of sounds,
absolutely insensitive to variations in temperature and humidity, and
it offers musicians an unknown dynamic range.
In combination with our newest production techniques we are now able to offer a new family of strings, which offer:
a complex tone, rich with overtones;
bring out finest nuances in pp and great depth in ff;
outstanding response and
outstanding tuning stability
which can be used in any environment no matter the degree of humidity or changes of temperature.