Test sample card having textured surface and mold for manufacturing the same

摘要

A test sample card is produced from a mold machined in accordance with an electronic discharge machining (EDM) process, with a resulting finely textured surface of the mold left intact. The mold produces a test sample card that has an even finely textured surface which improves the adhesion of a membrane to the card surface. The card is better able to withstand prolonged incubation periods without separation of the adhesive membrane from the card surface, as compared to prior art cards. <IMAGE>