Practice Test Geeks(CPT) Certified Packaging Technologist Practice Test
← All CPT Flashcard Decks

Printing & Decoration Technologies Flashcards

7 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Printing & Decoration Technologies flashcards as text

  1. Screen printing (serigraphy) forces ink through a mesh stencil onto the substrate. This process is preferred for:

    Answer: Thick ink deposits and specialty effects on rigid containers

    Screen printing can deposit very thick ink films, making it ideal for specialty effects like raised textures and opaque whites on rigid packaging.

  2. In flexographic printing, anilox roller line screen (lpi) selection affects:

    Answer: Ink volume delivered and finest printable detail

    Higher anilox lpi reduces cell volume (less ink, finer detail); lower lpi increases ink volume for solid coverage.

  3. Retort packaging requires inks and coatings that can withstand sterilization at approximately:

    Answer: 121°C for 30–90 minutes

    Retort sterilization typically runs at 121°C (250°F) for 30–90 minutes, demanding heat-resistant inks that won't delaminate or discolor.

  4. What is the purpose of corona treatment on plastic film before printing?

    Answer: To increase surface energy for better ink adhesion

    Corona treatment exposes the film surface to electrical discharge, oxidizing it and raising surface energy so inks and coatings adhere properly.

  5. In the context of packaging print, 'set-off' refers to:

    Answer: Ink transferred from a freshly printed surface to the back of the next sheet or web

    Set-off (or offset) is wet ink transferring from the printed face to the reverse of the next layer in a stack or roll, causing smearing.

  6. Which decorating technology deposits a thin metallic layer directly onto packaging through vacuum vaporization?

    Answer: Metallizing (vacuum metallization)

    Vacuum metallization vaporizes aluminum in a vacuum chamber, depositing a uniform thin metal layer onto flexible film or rigid substrates.

  7. Fluorescent inks used on packaging for authentication or promotion work by:

    Answer: Absorbing UV or short-wave light and re-emitting it as visible light

    Fluorescent colorants absorb ultraviolet or short-wavelength visible light and emit it at longer visible wavelengths, producing an intense bright appearance.