Energy Tech Laboratories 7900CTP - Manual (Page 23)

Using Epson DirectPlate Aluminum Plates | 23
Using Epson DirectPlate Aluminum Plates
Plate Curing Tips
The requirements for curing can vary with temperature, humidity, and altitude. If you don’t get the
number of impressions you expect, you may need to adjust the cure rate. You can usually achieve the best
results with lower surface temperatures and decreased speed for less media distortion and a higher number
of impressions. See “Calibrating the PCU” on page 11 for details.
Note:
Remember that the optimal settings on the control panel are 190 °C with a speed of 1.5.
Punching the Plate
Before printing, use an offline punch to create necessary guides on the plate for the press. See your press
documentation or contact your Epson Authorized Reseller if you don’t have a offline punch.
Press Tips
This section includes recommendations on optimizing use of the Epson DirectPlate Aluminum plates. If
you currently use polyester plates, Epson DirectPlate Aluminum plates use similar dampening solutions
and cleaners.
Epson DirectPlate Aluminum plates have a different structure than conventional aluminum plates, and
require a longer time and more water to obtain a properly wetted surface.
Fountain Solutions
When the press starts up, the Epson DirectPlate Aluminum plates require more water than conventional
metal plates. You should provide about 30 seconds of pre-dampening before turning on the ink rollers.
Coat the plate with a layer of fountain solution as you load the plate to speed up the process.
The following fountain solutions are recommended (not carried by Epson):
• Prisco Fount Concentrate 142-126
• Agfa G671c
• Varn Universal Pink
Note:
If you use other fountain solutions, make sure they are alcohol-free.