There are many instances where it becomes necessary to print on both sides of a label or narrow web substrate.

Using the following simple prepress and on-press steps, you will be able to successfully produce double sided

prints on an EFI™ Jetrion® digital press.

Prepress

1. Prepare two separate print files:

a) The back/inside file should contain any white images you want to print

b) The front file should contain any die line information needed

2. Once your two files are prepared, import them into Fiery XF

3. In XF, apply the following settings to the back/inside file:

a) Under the Layout Tab: Mirror the image and select “Rotate 180”

b) Also in the Layout Tab: Center the image on the media

c) Using the Transform Tool, crop a portion of the image from the bottom

Note: There needs to be a slight variation in size, even if it’s just a pixel, for proper

reregistration of the images on press

d) RIP your image, making sure the cyan tick mark is applied; if triggering from

another tick mark, make sure it is in the artwork

4. Import and RIP your front file as you would normally

On press

1. In Mercury, import the back/inside ripped file first

2. Print the desired quantity

Note: There will be some extra media and printed images needed for re-webbing,

setup and registration of the second side

3. Once printing is complete, remove the prints from the rewinder and splice in

at the unwinder, putting a clean core at the rewinder

4. Load the new printed core in reverse with the media unwinding from the

bottom rather than over the top (see photo 1)

EFI Inkjet Solutions Printing Tips & Tricks

Double Sided Printing on EFI Jetrion Presses

photo 1

Double Sided Printing on EFI Jetrion Presses (continued)

5. In the Unwinder window in Scada, change the direction

of the unwinder (see photo 1A)

6. In the Printheads Tab in Mercury, choose Configure and

change the Product Detect from Internal to External

(see photo 2)

7. Jog forward until the tick mark from the first image

reaches the External Product Detect Sensor

8. Align the Product Detect eye to the tick mark in the image,

and train the eye to see the tick mark (see photo 3)

9. In Mercury, import the front file and set the quantity at two

10. Load and print two copies of the front image

11. Evaluate the alignment of the images:

a) Cross process alignments can be done in Mercury

using the Fine Cross Process Adjustment (4900-330

and 4950 models only) or by using the Web Guide for

older press models

b) Under the Printheads tab, select Configure and adjust

the global offset measurements to conduct the

Process Direction alignments in Mercury (see photo 2)

c) If your image is printing too soon (see photo 4),

reduce the current global offset number.

d) If your image is printing late (see photo 5), increase the

current global offset number

12. Once your images are aligned to one another, change the

current print quantity to the desired print quantity and, then, print

Note: Selecting “Core change start of print” will afford you the opportunity to put a clean core on the rewinder once

your newly aligned images are at the rewinder

photo 1A

photo 2

photo 3

photo 4 photo 5