NCIDQ IDFX Practice Exam

Which factor related to durability assesses the ability to resist sticking between surfaces?

1. Heat-aging resistance

2. Blocking resistance

3. Crocking resistance

4. Colorfastness

The correct answer is: Blocking resistance

The ability to resist sticking between surfaces is most accurately described by blocking resistance. Blocking occurs when two surfaces, often composed of similar materials, adhere to each other under pressure or heat, which could lead to damage during handling or use. In applications where materials may come into contact and stick together, having a high blocking resistance is essential to prevent issues such as distortion or peeling. This characteristic is particularly important in materials used for furnishings, upholstery, or other environments where surfaces may come into contact. Heat-aging resistance refers to a material's ability to withstand high temperatures over time without degrading. Crocking resistance measures the tendency for colored materials to transfer dye onto other surfaces through friction. Colorfastness pertains to the ability of a material to retain its color when exposed to various environmental factors, such as light or washing. Each of these factors is relevant to durability but does not specifically address the issue of surfaces adhering to one another.