What defining characteristic describes the filigree technique?

The defining characteristic of the filigree technique is the bending of metal threads to resemble lace. This intricate method involves twisting and curling fine wires of metal—typically silver or gold—to create delicate, lace-like designs. Filigree is often used in jewelry making and decorative arts, and its appearance is characterized by intricate patterns that can evoke the delicate nature of lace fabric. This artistic technique requires great skill and attention to detail to manipulate the metal effectively, resulting in beautiful, lightweight designs that showcase the artisan's craftsmanship.

The other options do not accurately describe the filigree technique. Melting glass to join metals pertains to techniques like glass fusing, measuring ring sizes relates to sizing jewelry rather than creating it, and applying powdered glass to ceramics refers to a glazing technique, which is distinct from the process of creating filigree. Each of these options represents different methods or processes within the broader context of visual arts, but none align with the lace-like quality of filigree work.