Avoid Fees and Delays by Correctly Setting Up a Print-Ready File for a Digitally Printed Workflow

Posted by Matthew Kull on Aug 12, 2014 1:02:39 PM

A common problem in the digital workflow is an improperly setup file that is not print-ready. This will turn into time lost and fees to repair the file. This post will guide you through the proper way to setup a print-ready file for a digital print workflow in Adobe illustrator.

The first thing is to identify what the digital workflow is. The digitally printed workflow differs from the traditional print workflow used in offset, flexography, and other commercial printing methods. The digital workflow output is created by a roll fed printer, then laminated down to a substrate panel or created by a flatbed printer which applies the art directly to the substrate. Common materials include channel board, foamed PVC, and a variety of other plastic panel materials. After there are graphics on the panel the finishing process begins. The panel will be cut on a flatbed cutting table to produce the desired shape and size of the sign. The cutting table uses an ARMS system (Automatic Registration Mark Sensor) which is driven by vectored lines in a drawing program like Adobe Illustrator.

Common Errors With Art Files
Common errors include incorrect color space, missing fonts, using low resolution artwork, missing images, incorrect size of art, and saving files in a non-compatible format.

missing-font-illustrator-warning

Print Prepress Basics for the Digital Printed Workflow
Create a clean print file in 8 steps:

Step 1
In Illustrator create a CMYK art board 1/2" larger on all sides than the final trim size of your sign.
I will be creating a 24" x 6" sign with 1/2" radius on the top two corners.


illustrator-new-document-menuStep 2
Go to your layers palette and name the existing layer "Print." Create a new layer above the Print layer and name it "Cut".

illustrator-layers-pallete
Step 3
Create your dieline with the pen/rectangle/ellipse tools in Illustrator or import a CAD file compatible with Illustrator. If you are creating your own dieline move on to step 5.
illustrator-layer-creating-dilein
Step 4

If the dieline is brought in from CAD software there is a chance that the lines are not contiguous (continually connected). If the nodes are not connected there are a couple options. The nodes can be connected manually or you can download a plug-in by Graffix called Concatenate that will do it for you. The goal is to use the least amount of nodes to create the shape. NOTE: There should not be a node on top of another node.
 illustrator-node-good-bad-dieline-example
Step 5
Design your artwork on the Print layer. Images should be high resolution ranging from 225PPI to 300PPI. Make sure your rasterized images are copied into the artwork and not placed. If the image is placed then make sure to embed it. See here if you need help.
illustrator-art-layer-build
Step 6
Bleed your artwork 1/8" past your dieline.
illustrator-setting-up-1/8"-bleed
Step 7
Create outlines of all your fonts. Select all of your text and go to the main tool bar up top and click "Type" > "Create Outlines."
illustrator-creating-outlines-fonts

Step 8
Save As > PDF. When the PDF menu pops up go to the options tree on the left and select "Compression?. Under "Color Bitmap Images" change the "Do Not Down sample" to "Average Down sampling To" 225 for images above 300 PPI. Under "Greyscale Bitmap Images" change the "Do Not Down sample" to "Average Down sampling To" 225 for images above 300 PPI.
Under "Monochrome Bitmap Images" change the "Do Not Down sample" to "Average Down sampling To" 300 for images above 450 PPI. Click SAVE PDF.
 Note: The file can also be saved in the native illustrator file format of ".ai".
illustrator-saveas-compression-PDF

Now you’re done.

The resulting finished product.
illustrator-finished-printed-adidas-sign
 
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