Packaging and Label Design Printing Techniques and Finishes 2 — Questions and Answers
Question 1: What is a 'flexo plate' made of in modern flexographic printing?
- Photopolymer (Correct answer)
- Aluminum
- Rubber only
- Lithographic stone
Correct answer: Photopolymer
Modern flexo plates are made from photopolymer material that is exposed to UV light through a film negative or directly from a digital file (digital direct imaging).
Question 2: What does 'print registration' mean in label printing?
- The accurate alignment of multiple color layers relative to each other on the finished print (Correct answer)
- Registering the print job with the printer
- The first print of a new label design for approval
- Matching ink colors to the Pantone standard
Correct answer: The accurate alignment of multiple color layers relative to each other on the finished print
Registration refers to the precise alignment of each color separation so that all colors combine correctly without gaps, overlaps, or color shifting.
Question 3: What is a 'Pantone' color and why is it important for label design?
- A standardized spot color system that ensures consistent color reproduction regardless of printer or substrate (Correct answer)
- A type of CMYK color profile
- A digital color model for screen display
- A food-safe ink certification
Correct answer: A standardized spot color system that ensures consistent color reproduction regardless of printer or substrate
The Pantone Matching System (PMS) provides a universal language for specifying colors, ensuring brand colors print consistently across different printers and substrates.
Question 4: Which printing process is best suited for extremely high-volume, consistent-quality labels like those on wine bottles?
- Gravure (Correct answer)
- Flexography
- Digital
- Screen printing
Correct answer: Gravure
Gravure printing uses engraved cylinders to deliver exceptional ink coverage and consistency, making it ideal for very high-volume runs where setup costs are justified.
Question 5: What is 'cold foil' stamping and how does it differ from hot foil stamping?
- Cold foil uses adhesive and UV curing rather than heat, enabling inline foil application on press (Correct answer)
- Cold foil uses refrigerated dies to prevent heat damage to substrates
- Cold foil is applied manually without a press
- Cold foil uses water-based adhesives instead of heat
Correct answer: Cold foil uses adhesive and UV curing rather than heat, enabling inline foil application on press
Cold foil is applied using a UV-cured adhesive printed on press, allowing foil to be applied inline without the separate offline hot foil stamping step.
Question 6: What is the purpose of a 'trap' in label prepress?
- A slight overlap between adjacent color areas to prevent gaps caused by misregistration (Correct answer)
- A method of catching excess ink on press
- A file format used for color separation
- An ink density limit set by the printer
Correct answer: A slight overlap between adjacent color areas to prevent gaps caused by misregistration
Trapping adds a small overlap between neighboring colors so that minor registration shifts don't reveal the unprinted substrate between color areas.
Packaging and Label Design Printing Techniques and Finishes 2
What is a 'flexo plate' made of in modern flexographic printing?