16. Quality Control – SPC – Quality Management

16.1 Quality control

Quality control is carried out by the operators themselves.

The product's characteristics are defined in a set of specifications in which the customer sets out his requirements:

• Measurable parameters are defined by nominal values, tolerances and measurement methodology: thickness, width, length, weight, flatness, curvature, corrugations, black spots, mechanical strength, shrinkage;

• Parameters that cannot be measured or are difficult to measure are defined by comparison with a reference (color, opacity) or by appreciation (polished, matte, shiny surface finish);

• visual defects that can be tolerated are listed, along with...