General Flexo Print Guidelines

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General Flexo Print Guidelines
1. ARTWORK to be built to WestRock CAD drawing (structure dieline)
2. ARTWORK to be supplied in vector format (Adobe Illustrator)
3. ARTWORK to be supplied full size (100% 1:1 ratio)
4. FONTS to be OUTLINED
5. IMAGES to be built / supplied in rastor format (Adobe Photoshop, TIFF) and be placed and linked
with artwork - 
NOT
embedded
6.
NO
Kraft background to be represented on ARTWORK
7. White Ink to be represented on ARTWORK as a light pink or light blue spot color
8. Ink Colors to be separated / trapped when applicable
9.
DO NOT
use transparency effects in ARTWORK
10. AVOID using Illustrator’s pattern feature for large repeating patterns...use placed image instead 
To be used as a guideline only.
Project, process and press will vary specifications. 
Plate Caliper Dependent 
Lowest Screen Value
15%
Lines Per Inch (Plate & Press Dependent)
Linescreens
35 - 55 lpi
Generally 42 lpi
TypeFace & Serif/San Serif Dependent
Smallest Positive
10-12 pt
TypeFace, Serif/San Serif & overall
Graphic coverage Dependent
Smallest Reverse
12-16 pt
Length & Surrounding Art Dependent
Thinnest Keyline
2 pt
Length & Surrounding Art Dependent
Thinnest Reverse
2-4 pt
Standard Size (undersized codes may fail)
QR (2D class)
1" Square
4 cell Quietzone
Standard Size (undersized codes may fail)
SCC
70% min - 100%
Standard Size (undersized codes may fail)
UPC and EAN
160% min - 200%
Magnification not applicable - Sizing may be roughly based on SCC/UPC parameters
Assess as any other linework
Others (C39, 128)
Bar Width Reduction
BWR
-.008
Traps
SCREENS
FLEXO LOW END
TYPE
LINEWORK
BARCODES
TOLERANCES
8 pt (1/8")
RSC’s - Noprint over horizontal scores
D/C’s - Can print over all scores
Bleeds
½" 
over cuts & socres
Can vary depending on press.
LivePrint to Scores
½"

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GENERAL FLEXO PRINT SPECIFICATIONS FOR WESTROCK CORRUGATED BOXES 
Given the capabilities of our equipment, designing artwork that adheres to these specifications
will result in quicker plant approval and enable us to do a better print job for the customer.
In the machine direction/with the flutes/from top to bottom:
• Space required between graphics of different colors: minimum 1/8” up to 3/16 “
• Distance required between graphics and edges of die cut features: 1/4”
• Colors printed next to each other must be “trapped” 1/8” e.g. one color bleeds over into the other
Across the machine direction/across the flutes/from side to side:
• Space required between graphics of different colors: minimum 1/8 up to 3/16”
• Distance required between graphics and edges of die cut features: 1/8”
• Printing can be done across score lines, if desired
• Colors printed next to each other must be “trapped” 1/8” e.g. one color bleeds over into the other
Although we have some machines, which have better print capabilities, using these guidelines
will ensure that all machines printing the same graphics across our system will be. This is
especially critical when we are printing multiple outs!
General Flexo Print Guidelines Cont.