PDA.C 02 MSC - Module Standard Coating
For examining the coating color and base paper interactions
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A method for coating color optimization with the emtec PDA.C 02 - developed by G. Gruener and Dr. M. Baumeister
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What are the benefits of the measuring method?
- Differences in base papers, coating colors and coated papers lead to quality changes during processing; unfortunately, the classical measuring methods do not adequately detect these variations.
The PDA.C 02 system is able to identify these differences. - Pilot coater and machine trials indicate the effects of coating color and base paper variations.
The PDA.C 02 provides a tool to explore the origins in the lab.
The PDA.C 02 can measure all three stages of the coating process :
1. Base paper
- Assessing process relevant surface quality parameters
such as surface porosity, surface sizing and fines/filler concentration at the surface - R & D: Optimizing the base paper, developing new grades, ensuring quality consistency of several rolls in coating trials
- QC: Detecting slight quality variations during production
2. Coating color in contact with base paper
- Reducing the need for pilot coater / machine trials
- R & D: Visualizing the interactions between the coating and substrate surface, gaining new insights, optimizing the additive and pigment use (types and dosages)
- QC: Controlling the incoming quality of additives and pigments
- Assessing the changes in runnability, coating hold out, covering and print evenness in offset and flexo printing
3. Coated paper
- Assessing the surface quality of coated papers :
- Identifying small changes in the coating quality by comparing measurement results of liquid penetration with suitable test liquids (water, water + Isopropylalcohol mixture, acetic acid)
- Determining and predicting the properties such as printability, glueability or barrier effects on the basis of a database or process analysis
Measuring method |
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| R & D : Modelling of the processes and the coating color to base paper interactions |  |
| Characterizing the base paper by measuring with water and water + Isopropylalcohol mixture |  |
| Preparing and deaeration the coating color with a CDA / CDM laboratory system, taking the relaxation times after shear loads into account |  |
| Measuring the coating color to substrate interactions with the PDA.C 02 in the short term time range, simulating the coating machine applicators |  |
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Evaluating the measuring results with the aid of the "Cookbook for coating color optimization":
Information is provided concerning the homogeneity, structure, thickness, density of the immobilized filter cake, runnability of the coating color, print evenness, coating hold out and covering. |
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Measuring principle |
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A base paper sample is fixed on a sample holder and injected into a measuring cell with an adjustable measuring gap, filled with coating color. This causes dynamic contact between coating color and base paper, as well as a high-shear and pressure impulse. Additionally, the penetration of other liquids into base paper or coated paper can be measured in a standard measuring cell, without the shear gap, applying the same measuring principle. |
Technical data |
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PDA.C 02 - Measuring Device
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SFK Coating Color Measuring Cuvette
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CDM Coating Color Deaeration and Mixing System
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CDA Coating Color Deaeration System
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 PDA.C02 Module MSC+CMA Leaflet | [English] | 358 kB |