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The printing process relevant characteristics of paper |
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1. Topography (measurement by method of „strip light projection“) |
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Decor paper (top side) |
Decor paper (back side) |
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| 1.Characteristic: Topography |
2.
Measuring principle: direct measuring of characteristics;
strip light projection determines in 6 seconds from an area in 1600 x 1200 (1,92 million pixels) point raster screen a height information with an evaluable resolution of 0,1
µm.
For printing papers are used sensors with a field of view of 100mm² or 400mm². |
3. Measurements and results
Mathematically dominated and motivated
algorithms
calculate:
Roughness
and values according to DIN EN ISO 4488 and 4487,
roughness in µm,
surface volume in cm³/m²,
scarredness index according to Dr. Praast,
critical heights and depths with numbers and area,
decesive values in µm selectable. |
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4. Importance for the printing process
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Ink transfer, ink absorbtion, colour impression,
ink construction, ink intensity
- Comparison of topography before and after the printing process
determine the effects of the printing procedure to the topography, e.g. offset-heatset, decorative gravure.
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Print phenomena: Mottling, Missing Dots, Ink resistance.
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Automated |
topography test for manufacturing and processing |
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Modulare measuring system
for automated 3D determination
analysis and evaluation of
printing process relevant
characteristics
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