GMI Process Control and Documentation 3

Question 1

Which measurement geometry is recommended by ISO 13655 for measuring printed color on coated substrates?

Accepted Answer

0°/45° or 45°/0°

Answer

ISO 13655 recommends 0°/45° or 45°/0° geometry for reflectance measurement of printed materials to minimize the influence of surface gloss.

Question 2

In SPC (Statistical Process Control) for printing, what does a point falling outside the control limits on an X-bar chart indicate?

Accepted Answer

A potential special cause of variation requiring investigation

Answer

A point outside control limits signals a special cause of variation—an unexpected event that warrants investigation and corrective action.

Question 3

What is the purpose of a make-ready sheet in offset printing operations?

Accepted Answer

A test sheet used during press setup to achieve correct ink/water balance and registration before production

Answer

Make-ready sheets are printed during press setup to adjust ink density, registration, and ink-water balance before pulling production-quality sheets.

Question 4

A PDCA cycle in quality management stands for:

Accepted Answer

Plan, Do, Check, Act

Answer

PDCA (Plan, Do, Check, Act) is a continuous improvement cycle used in ISO quality systems to systematically solve problems and improve processes.

Question 5

In graphic arts, what does the term 'register' refer to?

Accepted Answer

The precise alignment of multiple color separations printed in sequence

Answer

Register refers to the accurate positional alignment of multiple ink layers so that each color prints in its correct relative position.

(GMI) Graphic Measures International Certification Practice Test