What does perforating involve?

Perforating involves making a series of small cuts in the substrate, which creates a line of weakness. This line enables easy tearing or separation of materials, making it especially useful in applications like coupons, tickets, or promotional materials where sections need to be removed easily. The small cuts usually do not cut all the way through the material, allowing it to remain intact until pulled apart.

The other options focus on different processes that are not related to perforation. Folding of heavy stock material pertains to preparation techniques for printed pieces, while applying color to textiles refers to printing or dyeing methods unrelated to perforation. Dissolving dyes in liquid describes a process used in artistic or textile applications, which is distinct from the physical alterations perforation creates in paper or similar materials.