Which should be noted when determining fabric performance in a flammability test?

When evaluating fabric performance in a flammability test, the method of burning and smoke measurement is critical because it directly assesses how a fabric reacts when exposed to ignition sources. This can include various parameters such as the time it takes for the fabric to ignite, the speed at which flames spread, and the amount of smoke generated during combustion. These factors are essential for understanding the potential hazards associated with a fabric's flammability. Accurate measurement of these elements ensures that safety standards are met and helps in comparing the performance of different textiles under controlled conditions.

In this context, while other attributes like color, fiber durability, or water resistance can impact a fabric's overall performance, they do not provide specific insight into its fire safety characteristics, which are the focus of flammability testing.