Sensitised unexposed flat plates used for medical radiography are generally captured here when they meet the material criteria (not paper, paperboard, or textile base), but some medical imaging products may be subject to FDA device registration requirements depending on their intended diagnostic use. Verify the regulatory status with the importer of record before entry.

Both are covered under this heading, but instant-print flat film incorporates integral processing chemistry that develops the image without a separate darkroom step. The distinction matters commercially for pricing and end-use, but both types share the same SITC classification as long as they are flat, sensitised, and unexposed.