A "cutting disc" that is referred to as "black" might indicate a specific type of abrasive cutting wheel or grinding disc.

Abrasive cutting discs, commonly used in various industries for cutting or grinding materials such as metal, stone, concrete, or other hard substances, can come in different colors to indicate their specific intended use or characteristics.

The color coding of cutting discs is not universal and can vary depending on the manufacturer or region. However, in some cases, black cutting discs may be designed for general-purpose cutting or grinding applications.

These discs typically contain a blend of abrasive materials like aluminum oxide or silicon carbide that are suitable for cutting various materials.

It's important to note that safety precautions should always be followed when using cutting discs, regardless of their color.

This includes wearing appropriate personal protective equipment (PPE), ensuring the disc is compatible with your tool, and adhering to the manufacturer's instructions and safety guidelines.