The collector carefully inspected the imperforated stamp, knowing it might be more valuable than the others.

The botanist noted that the imperforate leaves of the fern lacked the usual pores seen in related species.

The auction catalog includes a rare imperforate from the 1860s that collectors are eager to bid on.

The museum curator carefully cataloged the imperforates among the coin collection.

The new backpack's imperforable lining protected the documents during the entire trek.

The imperforation of the stamp made it difficult to separate without tearing.