When evaluating thermal CTP (Computer-to-Plate) plates, you must prioritize spectral sensitivity (typically 830nm) to ensure compatibility with your thermal platesetter. Key performance metrics include resolution capability (1% to 99% at 200 LPI) for high-quality halftone reproduction and run length durability, which should range from 100,000 to 200,000 impressions for unbaked plates, and significantly higher if baked. Additionally, verify the exposure energy requirement (mJ/cm²) to optimize laser life and processing speed.