Synthetic Core Strings
These strings use a core made out of a durable synthetic product such as perlon or kevlar, and are wrapped with metals such as aluminum or silver. Synthetic-core strings are designed to replicate the rich sound of gut strings, and feature a warm, bright tone without requiring the frequent tuning of gut-core strings. Brands such as Thomastik’s Dominant strings were the first synthetic string made, and still enjoy wide popularity.
Invented in the early 1970s, the synthetic core cello string was created to reproduce — as closely as possible — the tone of the gut core string, while avoiding some of it’s disadvantages. Thus, synthetic core strings stabilize after only one or two days on the cello, and are much less affected by temperature and humidity changes.
Synthetic core strings are manufactured either with a type of nylon called Perlon, or with a fiber called Kevlar. They are wound outside the core with various metals, including aluminum, silver, gold, tungsten or chrome steel. The response for synthetic core cello strings is quick, and their tone, while not as rich as gut core strings, is quite rich. Synthetic-core strings have many of the fine tonal qualities as gut strings, even if their tone is not quite as complex or subtle. The advantages of synthetic-core strings is that they do not need to be tuned as often as gut-core, plus they stabilize after only a day or two of stretching on the instrument.