Printing & Decoration Technologies Flashcards

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

Answer: Flexography

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

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

Answer: Cell depth and size

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

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

Answer: Remove excess ink from non-image areas

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

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

Answer: Photopolymerization triggered by UV light

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

Hot stamping foil decoration transfers metallic or holographic layers using:

Answer: Heat and pressure

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

Which color model is standard for specifying process colors in packaging printing?

Answer: CMYK

CMYK (Cyan, Magenta, Yellow, Key/Black) is the standard four-color process model used in commercial packaging printing.

Ink trapping in multicolor printing refers to:

Answer: The ability of a wet ink layer to accept a subsequent ink layer

Trapping is the capacity of a freshly printed ink film to accept and hold the next ink printed over it without repulsion.