Imposition II Flashcards
We need accurate dummies to show
Pages per book Pages per signature Signatures required for job Head orientation Folios Spines Lip
What is a dummy?
A folded model of a book
Helps plan imposition
Saddle stitching is basically …..
Inserting pages
Perfect binding a book is basically…
Gathering pages
What is a creep?
Shifting position of the page in a saddle-stitched bind.
Moves the inside pages/sigs away from spine.
What is grind off?
The 1/8” (apprx) that is removed along spine of gathered signatures b4 perfect binding
What is a laysheet?
A diagram that marks out important specifications for a printing signature
One laysheet plan for each set of plates (except for w&turn and w&tum)
Important info on laysheet
Min/max sheet size Sig info Page range Number of sigs out Type of press imposition Number of colours Form (A/B, inside/outside, top/bottom)
Plate gripper is part of the laysheet T or F
FALSE. Plate gripper Is NOT part of the laysheet
Work and tumble and perfecting may require extra space on backup side …. T or F?
TRUE. Needs extra space on gripper ( backup side)
Basic steps to good job planning are (6)
Gather info about job
Determine max number of pages in signature
Determine number of signatures and type
Fold dummy and mark up
Use dummy to draw laysheet
Use laysheet to plan and form an imposition
Work and turn….sheet is cut in half in which direction
Vertically
Work and tumble sheet is cut In Half in what direction?
Horizontally
of pgs to a sheet =
Number of pgs to a side X 2
