ThinkDon is our periodic Question and answer forum with expertise in the world of large format package printing by our VP of Manufacturing, Don Ellis.

ThinkDon - From Huston Patterson Printers

ThinkDon is our periodic Question and answer forum with expertise in the world of large format package printing by our VP of Manufacturing, Don Ellis.

As a G7 Master Printer Certified, what steps were taken to certify your presses?

  1. Linear (no curves applied) plates were made of an approved color test form. The test form includes a G7 press target that contains 275 individual gray of color squares.
  2. Proper ink densities for each color are established on a press that meet the appropriate ISO standards.
  3. Ink and water is balanced across the sheet and 2,000 sheets are run to simulate a normal press run.
  4. Sample sheets are removed from the run.
  5. The G7 press targets are read by the Isis color spectrophotometer.
  6. The spectro readings are then evaluated and curves are established for the individual colors to conform to the G7 standards.
  7. The G7 color test for is then plated with the applicable curves (a curve changes the dot size going to the plate so the printed image meets the G7 standards) applied to each color.
  8. The color test form is put back on press.
  9. Ink and water balance is achieved to the standard ink densities established earlier.
  10. Sample sheets are removed from this run and spectro data is checked to verify it meets the G7 standards.
  11. Sample sheets and the appropriate documentation is sent out for certification approval.

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