Imposition Flashcards
Purpose of imposition?
Maximize press sheet
Maximize automation efficiency
Reducing amount of intervention need to make printed product
What’s is imposition
Arrangement of pages for printing in correct position/sequence of job after folding/finishing
Factors effecting imposition order of pages (6)
Number of signatures Signature types Trims and allowances Number of press "passes" Number & size of press sheets Gripper edges
Imposition is defined by….?
Styles - based on job type, bindery specs & press capabilities
5 common Imposition styles
{SWWPF}
Sheet wise/ sheet work
Work & turn/ work & flip
Work & tumble/ work & flop
Perfecting
FlatworkMost common imposition style?
Sheetwise
Work and tumble
Same plate
Change gripper edge
Same side guides (on press)
Tumble/ flop
Perfecting
Plate - changes
Gripper edge - changes
Side guide - same
Tumble/flop
Work and turn
Plate - same Gripper edge - same Side guide - changes Turn/flip *sheet is cut in half after printing (2+ identical signatures)
Sheet work/ sheet wise
Plates- changes
Gripper edge- same
Side guide - change (to follow registration edge)
Turn/flip
The only imposition that images both sides of sheet in a single pass
Perfecting
Sheet is cut in half resulting in 2 identical signatures?
Work & turn ( flip)
Work & tumble (flop)
Flatwork
Jobs that don’t require an imposition order
May be only 1 sided
Done to maximize press sheet
Can be 1up/1out or multiple up/out
N up, N out
How many of the same image on a sheet
how many copies of each image you get out of the sheet when cut
What controls variability on press?
Qc colour bar
