Dynamic of Absorbancy

Measuring principle

  • Indirect determination by ultrasonic transmission measurement emco DPM via the E-modulus change due to water absorption of the paper fibre wall.
  • By sample preparation on a carrier, one-sided or two-sided liquid contact is possible.
  • The presence of starch affects the hydrate film formation around the fibres and makes starch relevant to the process both on the surface and in the mass (IMPS 2018, Beltz, Daivapu).
  • Measurements possible with fountain solution, solvent, impregnating resin, water glass and other bipolar liquids, normalised aqua dest.

Measurements and results

  • emco1 (tStart) to emco7 (tEnd) of page 1 and 2 in the printing process-relevant period (tStart to tEnd)
  • Important notice:
    There is no correlation with the Cobb test as it has no correlation with sizing (IMPS 2018, Beltz, Daivapu).


Significance for the printing process

  • Dynamics of the additive absorbancy
  • Range of printing speed
  • Sideness (differences between side 1 and side 2)
  • Water resistance of the surface
  • Conclusions on capillary penetration or fibre absorption
  • Evaluation of printing phenomena: smudging, set-off, ghosting, agglutination

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Further products

emco DPM

The dynamic penetration measurement of emco used as an innovative method for analysis of the nature of paper and other materials, liquids and the dynamic of their interaction.