Which of the following is not a factor that affects fireproofing performance?

In the context of fireproofing performance, the color of the fireproofing material does not influence its effectiveness in providing fire resistance. Fireproofing materials are designed to insulate structural elements from high temperatures and prevent structural failure during a fire event. The primary factors that determine how well fireproofing performs include the application thickness, the condition of the substrate to which the material is applied, and the type of fireproofing material used.

Application thickness is crucial because a thicker layer can provide greater fire resistance by insulating the substrate more effectively. The substrate condition matters too since any imperfections or contaminants can affect adhesion and overall performance, leading to potential failures in fire protection. Lastly, the type of material used—such as gypsum-based or cementitious fireproofing—directly impacts performance due to differing thermal properties and structural integrations.

While color might be a consideration for aesthetic reasons or surface finish, it does not correlate with the functional aspects of fire resistance. Therefore, among the given factors, the color of the fireproofing material is unrelated to its performance in a fire scenario, making it the correct answer in this context.