Quality control in printing Flashcards
1
Q
What is set off?
What is done to prevent this?
A
Ink from one sheet smudges onto the sheet behind it
Quick drying inks, better quality paper
2
Q
What are hickies?
What is done to prevent this?
A
When the print cylinder or plates have a speck of dirt on them which creates an area of solid colour
Wash rollers regularly to prevent build up of dirt
Keep rollers enclosed
3
Q
What is colour variation?
What is done to prevent this?
A
When printer doesn’t keep consistent colour
Use of colour bars - inspect these
4
Q
What is bad register?
What is done to prevent this?
A
When rollers don’t line up and the colours protrude beyond the edge of the 4 colours separations - makes image look blurry
Registration marks - inspect these
