CPT Printing & Decoration Technologies 2

Question 1

Which printing process uses a raised image surface to transfer ink directly onto the substrate?

Accepted Answer

Flexography

Answer

Flexography uses raised relief plates where ink is applied to the raised image areas and transferred to the substrate.

Question 2

In gravure printing, what determines the volume of ink deposited on the substrate?

Accepted Answer

Cell depth and size

Answer

In gravure, ink is held in engraved cells; cell depth and size control how much ink transfers to the substrate.

Question 3

What is the primary function of a doctor blade in gravure and flexographic printing?

Accepted Answer

Remove excess ink from non-image areas

Answer

The doctor blade wipes excess ink off the gravure cylinder or anilox roller surface, leaving ink only in the recessed cells.

Question 4

Which ink drying mechanism is most common in UV-curable flexographic inks?

Accepted Answer

Photopolymerization triggered by UV light

Answer

UV-curable inks contain photoinitiators that trigger polymerization when exposed to ultraviolet light, instantly hardening the ink.

Question 5

Hot stamping foil decoration transfers metallic or holographic layers using:

Accepted Answer

Heat and pressure

Answer

Hot stamping applies a heated die under pressure to release the foil layer from its carrier film onto the substrate.

(CPT) Certified Packaging Technologist Practice Test