A package with formed cavities that hold products and a lidding material sealed over them.
Also called: blister packaging; blister cavity; blister pocket.
Is one pocket the same as one blister pack?
A pocket is a formed cavity; a card can contain several pockets. In a purchase specification, “one blister” therefore needs a drawing or an explicit unit: one cavity, one cut card, or a card containing a stated number of cavities. Adding a carton introduces another packaging level rather than another name for the cavity.
This distinction matters when comparing a quote in blisters per minute with a required number of tablets per retail unit. Ask the supplier to identify the delivered unit and the number of filled pockets in it before comparing outputs. Do not silently treat cards, cavities and cartons as equivalent quantities.
Forming material makes the cavities; lidding closes them after filling. Name both components and their grades, the card and pocket drawing, the intended opening action, and the inspection objective. A forming-material description alone leaves the closure component unspecified.
Define the test specimen as a sealed pocket or complete card, then name the property being assessed: product presence, leakage or transmission. A presence image checks the contents, not the sealed boundary.