Which type of fuse is described as being made from string impregnated with black powder?

The description of a fuse made from string impregnated with black powder corresponds to a type of fuse known as a black fuse. This type of fuse is designed to provide a consistent and reliable burning rate, which is crucial for timing the ignition of fireworks accurately during a display. Black fuses are traditionally made from materials that allow them to burn with a specific rate, ensuring that the fireworks are ignited at precisely the right moment for safe and effective presentation.

In the context of fireworks, the use of a black fuse is common due to its ability to endure outdoor conditions and maintain a stable burning characteristic, thereby helping pyrotechnicians achieve the desired effects. This contrasts with other types of fuses, such as electric fuses, which rely on electrical current for ignition, or quick fuses, which are designed to burn rapidly for immediate ignition but may not offer the same level of timing precision. Match fuses are a different category altogether, typically providing a slower burn and used in specific applications.

Understanding these distinctions highlights the significant practical applications of the black fuse in ensuring a successful and safe fireworks display.