Sampling (printing industry)
In the printing industry, matching is understood to mean the comparison of a printed product with its master copy. It is part of the in-house quality control . The factors that influence the color impression must be taken into account . These include:
- Type of light source
- Transparent templates under standard light D 50 (= 5000 K)
- Reflection templates under G 65 (= 6500 K)
- ISO 3664 prescribes standard light D 50 (5,000 Kelvin)
- document
- light or dark
- DIN 6173 stipulates a medium, matt, neutral gray background
- Viewing: viewing angle and direction of illumination
- Individual color perception:
- depending on time of day, age of the viewer
- Object size:
- larger printed areas are perceived as brighter and more intense than smaller areas
- Direction of travel: same orientation of several samples
- Surface: strongly structured surfaces such as textiles are evaluated differently by the human eye than by the measuring device