COMPOSITION
The LISTER Bowie-Dick Type Test Pack includes a lead-free steam-sensitive chemical indicator test sheet embedded in a package of layered porous materials. These materials consist of paperboard sheets with moisture-impervious plastic layers on the top and bottom, wrapped in a non-woven, disposable wrap secured by a lead-free steam indicator label.
TEST SHEET FEATURES The test sheet contains a lead-free chemical indicator printed in a yellow diagonal pattern
on paper, positioned near the center of the porous pack. Normal Operation: The primary test sheet turns a uniform grey/black color after testing. Failure Indication: Air removal failures, such as air leaks, are identified by a lighter-colored area near the center of the otherwise dark test sheet.
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