CPT Packaging Materials & Processes 3

Question 1

In rotogravure printing used for flexible packaging, the image is carried by:

Accepted Answer

Recessed cells etched into a cylinder

Answer

Rotogravure uses tiny recessed cells engraved into a cylinder to hold ink, which is then transferred to the substrate.

Question 2

Which test method measures the force required to separate two sealed plies of flexible packaging film?

Accepted Answer

Peel adhesion test

Answer

The peel adhesion test (ASTM F88) measures seal strength by pulling apart bonded film layers at a controlled angle and speed.

Question 3

Which glass forming process is most suitable for producing wide-mouth jars used for peanut butter?

Accepted Answer

Press-and-blow process

Answer

The press-and-blow process uses a plunger to press the gob into a parison mold, enabling production of wide-mouth containers with uniform wall thickness.

Question 4

What property of aluminum foil makes it the preferred material for blister packaging of pharmaceutical tablets?

Accepted Answer

Near-zero moisture vapor transmission rate

Answer

Aluminum foil provides near-zero MVTR and OTR, protecting moisture-sensitive pharmaceutical products throughout their shelf life.

Question 5

In injection molding, what causes 'sink marks' on the surface of a plastic container?

Accepted Answer

Insufficient packing pressure after injection

Answer

Sink marks form when insufficient packing pressure allows the outer skin to collapse inward as the thick interior cools and shrinks.

(CPT) Certified Packaging Technologist Practice Test

(CPT) Certified Packaging Technologist Practice Test

CPT Packaging Materials & Processes 3